Motocross/Dirt Bike Exhaust Parts
Featured Brands
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Big Gun Exhaust®EVO R™ Slip-On (09-44502)EVO R™ Slip-On by Big Gun Exhaust®. The EVO R series draws on Big Gun Exhaust rich heritage of making power. Offered for various off road MX and sport ATV models, the EVO R is a tried-and-true series that will save weight, add...Hard anodized oval shaped aluminum mufflerTIG welded reinforced muffler bracket(s)$373.99 - Bill's Pipes®MX2 Nickel Head Pipe (KT-11N)MX2 Nickel Head Pipe by Bill's Pipes®. Bill's Pipes has long been synonymous with 2-strokes. Years later, even into the 4-stroke era, that hasn't changed. The legendary championship-winning performance and build quality of the MX2 pipe...19-gauge AKDQ carbon steel constructionUnplated finish gives you that “Works” look$132.95
- Bill's Pipes®SA-4 1-1 Exhaust System (42-Y25010)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$494.47
- Bill's Pipes®SA-4 1-1 Exhaust System (42-KT2511)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$303.13
- Bill's Pipes®SA-4 1-1 Exhaust System (42-KT4511)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$303.13
- Bill's Pipes®SA-4 1-1 Exhaust System (42-KT3511)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$303.13
- Bill's Pipes®SA-4 1-1 Exhaust System (42-KT3513)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$494.43
- Bill's Pipes®SA-4 1-1 Exhaust System (42-H25011C)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$494.47
- Bill's Pipes®SA-4 1-1 Exhaust System (42-KT2513)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$303.13
- Bill's Pipes®SA-4 1-1 Exhaust System (42-S4508)SA-4 1-1 Exhaust System by Bill's Pipes®. If you are looking for every ounce of power to squeeze out of your bike but don't want to spend a fortune, look no further. The SA-4 full system delivers performance that is unmatched for the...Light weight brushed aluminum mufflerTIG welded reinforced muffler bracket$303.13
- Bill's Pipes®SA-4 Head Pipe (4-KT4513H)SA-4 Head Pipe by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it. Not all models...TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$132.95
- Bill's Pipes®SA-4 Head Pipe (4-KT3513H)SA-4 Head Pipe by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it. Not all models...TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$132.95
- Bill's Pipes®SA-4 Head Pipe (4-KT2513H)SA-4 Head Pipe (4-KT2513H) by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it....TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$132.95
- Bill's Pipes®SA-4 Head Pipe (4-KT3511H)SA-4 Head Pipe by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it. Not all models...TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$232.90
- Bill's Pipes®SA-4 Head Pipe (4-K25014H)SA-4 Head Pipe by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it. Not all models...TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$214.26
- Bill's Pipes®SA-4 Head Pipe (4-KT2511H)SA-4 Head Pipe (4-KT2511H) by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it....TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$132.95
- Bill's Pipes®SA-4 Head Pipe (4-KT4511H)SA-4 Head Pipe by Bill's Pipes®. The SA-4 head pipe is offered as an option to add to your SA-4 slip on. If you have an existing SA-4 slip on and are looking to add more power and replace your stock head pipe, this is it. Not all models...TIG welded 304 Stainless steelLarger diameter than stock allowing more flow$132.95
- Bill's Pipes®SA-4 Slip-On Muffler (41-KT3513)SA-4 Slip-On Muffler by Bill's Pipes®. The SA-4 slip on is the best bang for your buck if you are looking for instant horsepower and torque gains. Allowing you to retain your stock head pipe, the SA-4 slip on replaces your heavy and...Light weight brushed aluminum mufflersTIG welded reinforced muffler brackets$287.84
- Bill's Pipes®SA-4 Slip-On Muffler (41-KT2513)SA-4 Slip-On Muffler (41-KT2513) by Bill's Pipes®. The SA-4 slip on is the best bang for your buck if you are looking for instant horsepower and torque gains. Allowing you to retain your stock head pipe, the SA-4 slip on replaces your...Light weight brushed aluminum mufflersTIG welded reinforced muffler brackets$170.19
- Bill's Pipes®SA-4 Slip-On Muffler (41-KT2511)SA-4 Slip-On Muffler (41-KT2511) by Bill's Pipes®. The SA-4 slip on is the best bang for your buck if you are looking for instant horsepower and torque gains. Allowing you to retain your stock head pipe, the SA-4 slip on replaces your...Light weight brushed aluminum mufflersTIG welded reinforced muffler brackets$170.19
- FMF Racing®1-1 Factory Rev Pipe (022064)1-1 Factory Rev Pipe by FMF Racing®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed for your exhaust system needsWill deliver unparalleled performance$251.99
- FMF Racing®1-1 Gnarly Pipe (020078)1-1 Gnarly Pipe by FMF Racing®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$314.99
- FMF Racing®1-1 Gnarly Pipe (025095)1-1 Gnarly Pipe by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$269.99
- FMF Racing®1-1 Gnarly Pipe (020079)1-1 Gnarly Pipe by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$292.49
- FMF Racing®1-1 Gnarly Pipe (025023)1-1 Gnarly Pipe by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$269.99
- FMF Racing®1-1 Gnarly Pipe (020156)1-1 Gnarly Pipe by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$278.99
- FMF Racing®1-1 Gnarly Pipe (020038)1-1 Gnarly Pipe by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$341.99
- FMF Racing®1-1 Gnarly Pipe (025203)1-1 Gnarly Pipe (025203) by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$269.99
- FMF Racing®1-1 Gnarly Pipe (022041)1-1 Gnarly Pipe by FMF Racing®. The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrain. When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe...Electro-nickel plated for a non-chip finish that will not discolorHeavy-duty Torque pipe for late model 200cc and up and uses a heavy duty 18 gauge steel body to hold up to the rigors of off-road riding$269.99
- FMF Racing®4-Stroke™ 1-1 Full Exhaust System (041016)4-Stroke™ 1-1 Full Exhaust System by FMF Racing®. The Mini Powercore 4 is the best bang for your buck performance bolt on for your mini. Offered as a standard Mini Powercore 4, Closed Course Big Bore System or as a Spark Arrestor...Designed for your exhaust system needsWill deliver unparalleled performance$251.99
Installing new and improved exhaust parts on your motocross or dirt bike is one of the most popular types of upgrade. It is a quick and easy way of unlocking more power from your 2-stroke or 4-stroke engine and adding some shiny, aggressive-looking details to your motorcycle. On the digital shelves of our online store, you can find a wide range of full exhaust systems, slip-ons, mufflers, silencers, exhaust covers, inserts, baffles, spark arrestors, heat shields, deflectors, clamps, gaskets, and other accessories and hardware pieces. Along with your new exhaust system, the installation of high-performance air intake components is highly recommended.
Since you seek to unlock the full potential of your engine with your new intake and exhaust parts, it is more likely that the carburetor on your 2-stroke engine will need re-jetting. With the new configuration of air intake and exhaust, the air and fuel mixture becomes too lean, meaning that it lacks fuel. The re-jetting process involves draining fuel from the carburetor, removing and disassembling the carburetor, installing the new jets, and putting all parts together again. After testing, if you feel that your carburetor still does not provide enough fuel, you have to repeat the process until you find the right jet kit for maximum efficiency.
If you own a bike powered by a 4-stroke engine with fuel injection, the tuning process becomes much simpler. You just need to acquire an EFI tuner which you can install yourself or go to a trusted mechanic. The new controller will regulate the time that the injectors stay open thus providing enough fuel for the smooth operation of your engine. But when choosing motocross/dirt bike exhaust parts, you have to think not only about power gains but also about silencing your noisy new exhaust as well as making sure that sparks flying out of your pipe won’t start a forest fire.
All dirt bike exhausts come with either mufflers or silencers. It is the part that makes sure that the noise level of your exhaust doesn’t exceed a decibel limit enforced by track owners or public land regulations. For bikes with 2-stroke engines, it is most often called a “silencer.” It is fairly easy to differentiate a 2-stroke exhaust from its 4-stroke counterpart. All 2-stroke exhaust systems have expansion chambers that use the pressure of exhaust gasses to push escaped air and fuel mixture back into the cylinder during the intake stroke. Silencers for 2-stroke exhausts are generally much more affordable than their 4-stroke analogs.
If you purchase a muffler for your 4-stroke exhaust system separately, it is usually called a “slip-on.” Off-road slip-ons feature more durable construction, while motocross exhausts are designed to reduce overall weight using materials like carbon fiber. Note that you can reduce the noise level by repacking your muffler. Off-road exhaust systems require repacking every 6-8 hours of riding since dirty packing restricts the flow of gases resulting in the loss of power. During competitions, it is recommended to repack mufflers after each race. The majority of aftermarket 4-stroke slip-ons already feature spark arrestors. If not, you can add a spark-arrestor end cup that meets the requirements of the United States Forest Service.