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SECTION F:

EXHAUST:

--Overview:

--Pipes: Headpipes, collectors, mufflers.

--Gaskets:


EXHAUST SYSTEM OVERVIEW:

As with many other systems on these bikes, the Yamaha XJ-series of exhaust systems are a mini marvel-to-behold, well thought out and engineered......so please do keep this in mind when considering aftermarket "performance" exhaust systems.

Let's start with the headpipes: many of them are actually of a double-wall design......an inner tube (that carries that gas) and an outer tube that can stay relatively cooler and thus maintains its chromed appearance much better and longer (this is why the chrome doesn't turn "blue"quickly, as it does with aftermarket, single-wall header pipes) . Additionally, they are tuned in their internal (gas-carrying) pipe diameter to match the flow characteristics needed for their intended use.....thus, for example, even though the headpipes for an XJ650RJ Seca can physically be installed onto an XJ700 engine, the inner pipe diameters do differ, and thus the swap may cause more harm than good, as it messes up with the balance of airflow thru the engine.

Pipe diameter helps determines (among other things) both the volume of exhaust gas that can be carried away, and, equally as important, the speed at which those gases will flow thru the pipe. All other things being equal, a bigger diameter pipe --- while surely capable of flowing more gas volume --- will also slow down the progress of gas thru that pipe......which, in the world of exhaust gas flow --- and its important effects on intake gas flow (how well each cylinder can be scavenged of its burnt exhaust gases and allow for a full and complete incoming fuel/air charge) --- is a mighty important consideration.

http://www.gomog.com/allmorgan/exhaustbackpressure.html


By the way......although we've touched on some of the reasons above.....in regards to "swapping" headpipes between models, our best advice is: don't. Besides the whole "gas capacity and velocity" issues discussed above, there also the issue of fit: although the headpipes between a 550 and a 750 (for example) may look the same, and may actually bolt onto the cylinders heads, both their length and their unique bend angles ---- needed to follow the frame and mate up with the exhaust collector ---- will likely be different.


Next: the collector. Although these weren't used on the XJ650 Maxim and XJ1100 models --- those bikes use a crossover pipe to perform the same function --- the collector box performs a few not-so-obvious but very important functions, and does it in a very admirable manner. First, of course, it provides a transition between the headpipes and the mufflers. Second, it keeps the decibel levels down to a reasonable volume. And finally....and very important for overall engine performance.....it provides a method of assisting that all-important "gas velocity" by providing a sufficient volume of space for "warehousing" (temporarily) the exhaust gas volume, while also providing (via its unique design) the ability to assist in providing maximal exhaust gas flow.

If you've ever looked carefully at your heavy (and probably-rusty) collector, you'll notice that it is designed ("split") in such a way so that cylinders 1 & 4 (the outer two) "share" a certain internal cavity space, while cylinders 2 & 3 "share" the rest of it. This is important because of the firing order of your engine: 1-2-4-3

If cylinders #1 and 2 --- which fire sequentially (and, thus need to exhaust their spent gases sequentially) ---- were to share the same exhaust cavity, then their (sequential) exhaust gas flows would be "spaced" too close to each other (in time) and would see vastly different back-pressures (cylinder 2, which fires after cylinder 1, would see more back-pressure than cylinder 1, which emptied itself into a, well, into an "empty" exhaust collector).

To put it another way, cylinder #2 sees a lot more back-pressure than cylinder #1, because the gas pulse from #1 doesn't have much time to exit the system before the pulse from #2 is trying to squeeze itself in the same pipe. Notice that cylinders #3 and 4 have a similar situation.

The same thought goes for the other two cylinders (# 2 and 3). Notice how even the aftermarket "dual" exhaust systems suffer from the above problem, since they are really two separate system, one system being for cylinders #1 and 2 (left side) and the other being for #3 and 4. Notice how it's the "sequential" problem.....since cylinders 1 and 2 fire (and exhaust themselves) sequentially, and since those gases vent into one common chamber, that cylinder #2 is going to see more backpressure than cylinder #1 will......and same for #3 and 4.

This un-balanced situation....with different cylinders seeing different exhaust system back-pressures......can (and does) result in different amounts of burnt gas scavenging from the differing cylinders, which is not the way to get an engine to make the most amount of power.


Aftermarket 4-into-1 systems overcome this "differential scavenging" situation by re-introducing, somewhat, a "collector".......where the fours pipes come together into a common chamber, just before the muffler. This collector allows the system to maintain some amount of equalized back-pressure (and thus burnt gas scavenging), while the particular placement of the four headpipes, as they come into the collector, allows a little bit of "pull-thru" between each cylinder, helping to reduce overall system back-pressure levels, while still maintaining a somewhat equal amount of back-pressure to each cylinder.

Or, maybe, aftermarket systems do no such thing:

http://www.motorcycleproject.com/text/exhausts2.html


Of course, the final piece of the puzzle is the mufflers, which are primarily decorative pieces....they look nice, stylish to the lines of the bike, contribute almost no back pressure to the system, and provide a nice throaty (but not too loud or droning or buzzing) sound output.


So just remember that the real heavy-lifting in the exhaust system is actually done by the headpipes and the unique, well-designed (but often overlooked) collector box.



EXHAUST HEADPIPES:

Exhaust Pipe Wrap:

So, if you're headpipes are all rusty and crusty and basically socially unacceptable to be seen out in public with, but you don't want to string for the expense of new, used, or re-chromed replacement pipes, well then there's always the handy RACER'S EXHAUST WRAP TAPE. Tough, durable, fiberglass cloth wrap withstands heat up to 2000-F, and also looks great on those "old-skool" resto projects.

These wraps come in either 1" or 2" wide versions, in both a jet-black or a tan (off-white) color. Well, you'll have to measure the diameter of your header pipes to tell for sure! But with the "typical" diameter of 1-1/2", and with a wrap technique that overlaps about 1/2", you'll need about 25' of roll length of the 2" wide wrap to do four header pipes, and slightly more when using the skinnier 1" wide wrap material.

Of course, the 1" wide wrap will allow you to create a tighter, more closely-spaced wrap appearance, while the 2" wide material gives you those big, wide-open-spaces look..........

To finish up your wrap, you'll need some stainless steel WRAP BAND-TIES" to terminate each end of the wrap.....so two of those per header pipe, total of 8 per bike.

NOTE: since the wrap is made from specially constructed version of fiberglass, it is ever-so-strongly recommended that you wear our fabric or rubber work gloves, a long sleeve shirt and long pants, and eye protection when installing this wrap.....or you'll be itching for days!!



HCP10647 Aftermarket high-heat EXHAUST WRAP, "dirty" off-white color, 1" wide x 50-foot roll.
$ 34.95

HCP10648 Aftermarket high-heat EXHAUST WRAP, "dirty" off-white color, 2" wide x 50-foot roll.
$ 49.95



HCP10645 Aftermarket high-heat EXHAUST WRAP, jet-black color, 1" wide x 50-foot roll.
$ 29.95

HCP10646 Aftermarket high-heat EXHAUST WRAP, jet-black color, 2" wide x 50-foot roll.
$ 49.95



HCP10649 Aftermarket high-heat EXHAUST WRAP, copper color, 1" wide x 50-foot roll.
$ 32.95

HCP10650 Aftermarket high-heat EXHAUST WRAP, copper color, 2" wide x 50-foot roll.
$ 49.95




HCP10639 Aftermarket polished stainless-steel WRAP END BAND-TIE, securely cinches the ends of the header wrap to prevent it from unraveling. Extra-long 14" length gives you plenty of excess material to exert cinching action with, and can then be trimmed off to a nice, neat finished appearance. These are not the typical slotted "worm-screws" clamps (like hose clamps), but a very decorative, completely smooth-surfaced band with a unique cinch clasp. Use 2 per headpipe. Each:
$ 2.95

HCP10639SET8 Aftermarket polished stainless-steel WRAP END BAND-TIES, set of 8:
$ 18.95


NOTE: the following product(s) can only be shipped via ground transport (which thus eliminates the Priority Mail level of service for this item) and cannot (and will not----don't even ask!) be shipped outside of the continental USA. Therefore it may have to be shipped in a separate package from the remainder of your order, and will thus incur additional shipping charges.

HCP11044 Aftermarket high-heat EXHAUST WRAP PAINT, flat black, protects and insulates the header wrap material. 12-ounce spray can.
$ 11.95

HCP11045 Aftermarket high-heat EXHAUST WRAP PAINT, flat silver, protects and insulates the header wrap material. 12-ounce spray can.
$ 11.95

HCP11046 Aftermarket high-heat EXHAUST WRAP PAINT, flat copper, protects and insulates the header wrap material. 12-ounce spray can.
$ 12.95





Exhaust Pipe Polish:

Well, suppose your exhaust pipes aren't rusty and cruddy, but they've turned blue or otherwise dis-colored? Well, the world-famous "blue-away" CHROME POLISH is what you'll need, as its specially formulated to remove the bluish haze from chromed and stainless steel. NOTE: our experience shows if the chrome has been discolored beyond "blue" to an almost black-ish - grey color, then this product (nor any other that we know of) will remove such discoloration.

It is recommended that our metal sealer HCP10640 be applied after polishing to protect and seal the finish.



HCP8236 Aftermarket Blue-Away CHROME POLISH, comes in a 2.5 ounce tube, a little bit goes a long way! NOTE: this product can only be shipped via ground transportation and cannot be shipped outside of the continental USA.
$ 16.00

HCP10641 Aftermarket metal POLISH and SEALER, comes in a 3.5 ounce tube. While this product is also a polish----like the Blue-Away above---it is not specially formulated to remove the high-temp "bluing" that occurs. However, it does leave a hard, corrosion-resistant finish on aluminum, chromed, and stainless steel (and is very well suited for use as a polish on those materials), we also recommend it merely for its protective qualities when using the HCP8236 polish on exhaust systems.
$ 8.95



EXHAUST COLLECTOR:

HCP2611 OEM exhaust header pipes COLLECTOR BOX, 4 header pipes come in, two muffler connector pipes go out. Comes complete with the outer side chrome covers, for all XJ750 Seca models.
$ discontinued



EXHAUST SYSTEM GASKETS:

Exhaust system joints and their gaskets take a pounding, get old and compressed, and then leak.....and sometimes, those leaks can sound exactly like the sound that an engine makes when it's on the verge of self-destruction!

To check for exhaust leaks, take a small stick, pencil, etc. and scotch tape a small section of toilet tissue to it, so you have a "flag" of sorts. Then hold it up around each exhaust joint, and if there's a leak, the flag will blow wildly around, letting you know about the source of the leak and the dreadful sound that you've been hearing........

NOTE: all of the gaskets listed in this section are verified to only fit stock, factory original exhaust systems only! We have no knowledge or experience with any of these items fitting any aftermarket exhaust systems.

All factory exhaust system components use sleeve gaskets at every exhaust joint (header-to-collector, collector-to-muffler can). Most of the gaskets are different sizes for different engines, as different engines used different sized header pipes, collector boxes, and of course mufflers (and by "size" we mean the outer diameter of the junction point, not the just the shape or style of the item).


Exhaust System Interchange: generally, no, you can't, as the different components will not interchange, mainly due to:

a) header pipes: the length, bend angle, and how far back/at what angle the pipes enter the collector box. Header pipes generally follow the lines of the front of the frame of the bike, and are designed to plug into the collector box at a certain angle.

b) collector boxes are designed to accept and then exit into the mufflers at a certain angle and point, and two collectors boxes that may be the same length may have differing angles of entry and exit designed for different bikes.

c) muffler cans..........besides differing inlet tube diameters, some mufflers are "kinked" or bent about 6-8" behind where they exit the collector box, whereas others are straight as an arrow, designed so that they can follow the lines of the bike correctly. Other models (XJ650, XJ1100) do away with the collector box entirely, and the muffler is integrated into the "collector" that accepts the header pipe outlets.

On other models, the mounting point for hanging the muffler will differ in placement even upon mufflers which might otherwise "fit" and interchange properly.



Cylinder Head Exhaust Port Gaskets:

a9) OEM and aftermarket cylinder head EXHAUST PORT RING GASKET....these thin "doughnut" ring gasket between the cylinder head and the exhaust header pipe. A very common source of leaks. You should ALWAYS replace these gaskets whenever you remove your exhaust header(s). Aftermarket versions fit and seal just like the originals.

A good visual on the procedure involved to remove and replace these gaskets can be seen at:

http://xjbikes.com/forums/index.php?threads/29356


NOTE: it may be necessary to use 2 of the exhaust port gaskets (instead of 1) per port when using aftermarket exhaust systems (MAC, Kerker, etc.) to achieve a leak-proof fit, and it is recommended that the OEM gaskets be used for such applications.


HCP583 OEM cylinder head Exhaust Port-to-Header pipe RING GASKET, copper ring with shredded stainless core, 3.50mm thick (un-crushed). Fits all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, all XJ700, all XJ750, and all XJ900 models. Also fits: 1983 XZ550RK, 1987-1988, 1990, 1993, and 1995-00 XV535 Virago (use 1, at the outlet of the rear cylinder’s short joint pipe), 1986-2006 XVS650 V-Star, 1987 FZ700, 1986-87 FZX700 Fazer, 1985-86 and 1988 FZ750, and 1987-88 FZR750 Fazer models. Each:
$ 8.95

HCP583SET4 OEM cylinder head Exhaust Port-to-Header pipe RING GASKETS, set of 4:
$ 34.95


HCP26470 Aftermarket cylinder head Exhaust Port-to-Header pipe RING GASKET, aluminum ring with a synthetic material core, seals as well as the originals, 4.20mm thick (un-crushed). This gasket is thinner than the HCP1617 gasket below (and thus much closer to the original thickness of the HCP583 original gasket). Fits all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, all XJ700, all XJ750, and all XJ900 models. Also fits: 1983 XZ550RK, 1987-1988, 1990, 1993, and 1995-00 XV535 Virago (use 1, at the outlet of the rear cylinder’s short joint pipe), 1986-2006 XVS650 V-Star, 1987 FZ700, 1986-87 FZX700 Fazer, 1985-86 and 1988 FZ750, and 1987-88 FZR750 Fazer models. Each:
$ 5.95

HCP26470SET4 Aftermarket cylinder head Exhaust Port-to-Header pipe RING GASKETS, set of 4:
$ 19.95


HCP1617 Aftermarket cylinder head Exhaust Port-to-Header pipe RING GASKET, aluminum ring with a synthetic material core, seals as well as the originals, 5.20mm (un-crushed). This gasket is almost 2mm thicker than the original gasket, and may present some installation difficulties, especially when used with aftermarket exhaust systems. Fits all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, all XJ700, all XJ750, and all XJ900 models. Also fits: 1983 XZ550RK, 1987-1988, 1990, 1993, and 1995-00 XV535 Virago (use 1, at the outlet of the rear cylinder’s short joint point), 1986-2006 XVS650 V-Star, 1987 FZ700, 1986-87 FZX700 Fazer, 1985-86 and 1988 FZ750, and 1987-88 FZR750 Fazer models. Each:
$ 4.95

HCP1617SET4 Aftermarket cylinder head Exhaust Port-to-Header pipe RING GASKETS, set of 4:
$ 17.95




HCP1253 OEM cylinder head Exhaust Port-to-Header pipe RING GASKET, fits all XJ1100 and XS1100 models, aluminum ring with composite material core. Also fits the following models: 1982-83 XS400, 1978 XS750 E/SE/SE-31/E_227, 1979 XS750 F/SF, 1980-81 XS850, 1984-85 FJ1100, 1985-93 FJ1200, 1983 XV500, and all 1987-1988, 1990, 1993, and 1995-00 XV535 Virago models (use 2, at the cylinder head outlet). Each:
$ 5.95

HCP1253SET4 OEM cylinder head Exhaust Port-to-Header pipe RING GASKETS, fits all XJ1100 and XS1100 models, set of 4:
$ 19.95


HCP15775 Aftermarket exhaust Port-to-Headpipe RING GASKET, fits all XJ1100 and XS1100 models, aluminum ring with synthetic material core. Also fits the following models: 1982-83 XS400, 1978 XS750 E/SE/SE-31/E_227, 1979 XS750 F/SF, 1980-81 XS850, 1984-85 FJ1100, 1985-93 FJ1200, 1983 XV500, and all 1987-1988, 1990, 1993, and 1995-00 XV535 Virago models (use 2, at the cylinder head outlet). Each:
$ 4.95

HCP15775SET4 Aftermarket exhaust Port-to-Headpipe RING GASKETS, fits all XJ1100 and XS1100 models, set of 4:
$ 17.95


HCP1618 Aftermarket exhaust Port-to-Headpipe RING GASKET, fits all XJ1100 and XS1100 models, stainless steel ring with synthetic material core. Also fits the following models: 1982-83 XS400, 1978 XS750 E/SE/SE-31/E_227, 1979 XS750 F/SF, 1980-81 XS850, 1984-85 FJ1100, 1985-93 FJ1200, 1983 XV500, and all 1987-1988, 1990, 1993, and 1995-00 XV535 Virago models (use 2, at the cylinder head outlet). Each:
$ 3.95

HCP1618SET4 Aftermarket exhaust Port-to-Headpipe RING GASKETS, fits all XJ1100 and XS1100 models, set of 4:
$ 13.95



Header Pipe Outlet to Exhaust Collector Inlet Gaskets:

a29) OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET....these thick doughnut and flange gaskets are used in various places on your exhaust system, and are a common source of leaks. You should carefully inspect and replace any worn or damaged originals whenever you remove your exhaust system components.


HCP584 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET.......where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ550, XJ650 Seca and Turbo models, and all XJ750 models (except XJ750-X and XJ750RL). Each:
$ 44.95

HCP584SET4 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 4:
$ 169.95


HCP18140 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET.......where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ550, XJ650 Seca and Turbo models, and all XJ750 models (except XJ750-X and XJ750RL). Each:
$ 24.95

HCP18140SET4 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 4:
$ 89.95



HCP19334 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET.......where the #2 and #3 headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 2 per bike. For use on all 1984-85 FJ600 models. Each:
$ 27.95



HCP585 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET..........where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ650 Maxim and Midnight Maxims, all XJ700 and XJ750-X models, XJ750RL, and XJ900 S/SH models. Each:
$ 26.95

HCP585SET4 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 4:
$ 99.95


HCP18141 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET....... where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ650 Maxim and Midnight Maxims, all XJ700 and XJ750-X models, XJ750RL, and XJ900 S/SH models. Each:
$ 19.95

HCP18141SET4 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 4:
$ 74.95




HCP2621 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET.......where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ900RK, RL, N/FN, and F models. Each:
$ 21.95

HCP2621SET4 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 4:
$ 77.95


HCP18144 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET.......where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ900RK, RL, N/FN, and F models. Each:
$ 17.95

HCP18144SET4 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET . Set of 4:
$ 64.95




HCP13449 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET..........where each headpipe ends and joins into the collector is where you'll find these gaskets. Use 1 per pipe joint, 4 per bike. For use on all XJ900 S/SH models. Each:
$ 19.00

HCP13449SET4 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 4:
$ 74.95



HCP588 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET. Use 1 per joint on the #2 and #3 header pipes, 2 per bike. For use on all XJ1100 and XS1100 models. Each:
$ 24.95

HCP588SET2 OEM exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 2:
$ 47.95


HCP18142 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKET. Use 1 per joint on the #2 and #3 header pipes, 2 per bike. For use on all XJ1100 and XS1100 models. Each:
$ 19.95

HCP18142SET2 Aftermarket exhaust system HEADER PIPE OUTLET-to-COLLECTOR INLET GASKETS. Set of 2:
$ 34.95



Exhaust Crossover Pipe Joint Gaskets:

a30) OEM exhaust system CROSSOVER PIPE JOINT GASKET....these thick doughnut gaskets are used where the forward crossover pipe (FJ600) left-to-right collector (XJ650 Maxim) or the left-to-right muffler can (XJ1100 and XS1100) crossover pipes join, and are a common source of leaks. You should carefully inspect and replace any worn or damaged originals whenever you remove your exhaust system components. Use 1 per bike.


HCP585 OEM exhaust system CROSSOVER PIPE JOINT GASKET..........where the front crossover pipe joins the central tube. Use 2 per pipe joint. For use on all 1984-85 FJ600 models. Each:
$ 26.95

HCP18141 Aftermarket exhaust system CROSSOVER PIPE JOINT GASKET..........where the front crossover pipe joins the central tube. Use 2 per pipe joint. For use on all 1984-85 FJ600 models. Each:
$ 19.95



HCP19934 OEM exhaust system CROSSOVER PIPE JOINT GASKET..........where the rear crossover pipe joins together. Use 1 per pipe joint. For use on all FJ600 models. Each:
$ 27.95



HCP584 OEM exhaust system CROSSOVER PIPE JOINT GASKET. For use on all XJ650 Maxim and Midnight Maxim models.
$ 44.95

HCP18140 Aftermarket exhaust system CROSSOVER PIPE JOINT GASKET. For use on all XJ650 Maxim and Midnight Maxim models
$ 24.95



HCP588 OEM exhaust system CROSSOVER PIPE JOINT GASKET. For use on all XJ1100 and XS1100 models.
$ 24.95

HCP18142 Aftermarket exhaust system CROSSOVER PIPE JOINT GASKET. For use on all XJ1100 and XS1100 models:
$ 19.95



Collector Box Outlet to Muffler Can Inlet Gaskets:

a30) OEM exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. These doughnut gaskets are used at the rear of the system collector, and joint the muffler can inlet, and are a common source of leaks. Use 1 gasket per muffler, 2 per bike. You should carefully inspect and replace any worn or damaged originals whenever you remove your exhaust system components.


HCP588 OEM exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. For use on all XJ550 models, XJ650 Seca models, all XJ750 non-X models, XJ900RK, RL, N/FN, and F models, XJ1100, and all XS1100 models. Each:
$ 24.95

HCP588SET2 OEM exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. For use on all XJ550 models, XJ650 Seca models, all XJ750 non-X models, XJ900RK, RL, N/FN, and F models, XJ1100, and all XS1100 models. Set of 2:
$ 47.95



HCP18142 Aftermarket exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. For use on all XJ550 models, XJ650 Seca models, all XJ750 non-X models, XJ900RK, RL, N/FN, and F models, XJ1100, and all XS1100 models. Each:
$ 19.95

HCP18142SET2 Aftermarket exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. For use on all XJ550 models, XJ650 Seca models, all XJ750 non-X models, XJ900RK, RL, N/FN, and F models, XJ1100, and all XS1100 models. Set of 2:
$ 34.95



HCP13449 OEM exhaust system HEADER PIPE OUTLET-to-MUFFLER INLET GASKET..........where each headpipe ends and joins into the muffler is where you'll find these gaskets. Use 1 per pipe joint, or 2 per engine on all 1992-98 XJ600 Seca II models. Each:
$ 19.95

HCP13449SET2 OEM exhaust system HEADER PIPE OUTLET-to-MUFFLER INLET GASKET . Set of 2:
$ 37.95



HCP2621 OEM exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. For use on all XJ700 and XJ750-X models. Each:
$ 21.95

HCP2621SET2 OEM exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKETS. Set of 2:
$ 39.95


HCP18144 Aftermarket exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKET. For use on all XJ700 and XJ750-X models. Each:
$ 17.95

HCP18144SET2 Aftermarket exhaust system COLLECTOR OUTLET-to-MUFFLER CAN INLET GASKETS. Set of 2:
$ 32.95



Turbocharger System Specialty Gaskets:

OEM and aftermarket turbo system gaskets perfectly replace these specialized gaskets to keep your turbo system quiet and exhaling properly. NOTE: the cylinder head exhaust port round “ring” gaskets, and the header pipe outlet-to-collector inlet sleeve gaskets are standard parts, and can be found in the appropriate sections listed above.


HCP2626 OEM exhaust system EXHAUST COLLECTOR OUTLET-to-TURBO HOUSING INLET GASKET. This oval-oval shaped, dimpled metal gasket features the metal “fire ring” around the central hole to resist the high pressures and temps associated with turbo systems. Use 1 per engine on all XJ650 Turbo models. Each:
$ discontinued

HCP24276M Aftermarket exhaust system EXHAUST COLLECTOR OUTLET-to-TURBO HOUSING INLET GASKET. This oval-oval shaped, dimpled metal gasket features the metal “fire ring” around the central hole to resist the high pressures and temps associated with turbo systems. Use 1 per engine on all XJ650 Turbo models. Each:
$ 17.95


HCP2627 OEM exhaust system TURBO OUTLET-to-LEFT MUFFLER INLET GASKET. This triangle-shaped, dimpled metal gasket features the metal “fire ring” around the central hole to resist the high pressures and temps associated with turbo systems. Use 1 per engine on all XJ650 Turbo models. Each:
$ discontinued

HCP24277M Aftermarket exhaust system TURBO OUTLET-to-LEFT MUFFLER INLET GASKET. This triangle-shaped, dimpled metal gasket features the metal “fire ring” around the central hole to resist the high pressures and temps associated with turbo systems. Use 1 per engine on all XJ650 Turbo models. Each:
$ 17.95


HCP2625 OEM exhaust system TURBO WASTEGATE OUTLET-to-RIGHT MUFFLER JOINT PIPE INLET GASKET. This round, dimpled metal gasket features the metal “fire ring” around the central hole to resist the high pressures and temps associated with turbo systems. Use 1 per engine on all XJ650 Turbo models. Each:
$ discontinued

HCP24266M Aftermarket exhaust system TURBO WASTEGATE OUTLET-to-RIGHT MUFFLER JOINT PIPE INLET GASKET. This round, dimpled metal gasket features the metal “fire ring” around the central hole to resist the high pressures and temps associated with turbo systems. Use 1 per engine on all XJ650 Turbo models. Each:
$ 24.95

HCP24266G Aftermarket exhaust system TURBO WASTEGATE OUTLET-to-RIGHT MUFFLER JOINT PIPE INLET GASKET. The round gasket is made of an aramid graphite material and does not feature the original metal “fire ring” around the central hole as original. Aramid graphite is a strong, high-temp material and is a good, less-expensive substitute material to use for this application, as this right side portion of the exhaust system is only active during pressure pops when the wastegate is activated (to bleed off excess pressures). Of course, if you’re redlining in every gear and/or have a modified wastegate - boost controller system that regularly is going to run up to really high system pressures, then we recommend the original metal style gasket (HCP24266M) above to prevent blowing out this graphite gasket (this graphite material is not nearly as resistant to high pressures as the original style metal gasket is) Use 1 per engine on all XJ650 Turbo models. Each:
$ 11.95



HCP2624 OEM exhaust system TURBO JOINT PIPE-to-RIGHT MUFFLER CAN INLET GASKET. Where the right side turbo “joint pipe” outlet ends and fits onto the right muffler can inlet “S-shaped” pipe is where you'll find this cylindrical "sleeve" gasket. Use 1 gasket per bike. For use on all XJ650 Turbo models.
$ 29.95
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