Pro Circuit
Pro Circuit is a legendary name in motocross and off-road performance, producing high-performance motorcycle exhaust systems, silencers and racing engine components. Known for innovation and race-proven engineering, the brand develops Ti-6 titanium exhaust systems, T-6 stainless exhausts, Works pipes and R-304 silencers for professional and amateur riders. Pro Circuit components are designed to maximize horsepower, throttle response and overall engine efficiency.
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Pro Circuit - 0321945FP - Ti-6 Pro Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201847 - Ti-6 Pro ExhaustFeaturesCreated as a full race system, the Ti-6 Pro is designed to increase performance and help professional racers pass AMA/FIM sound regulationsSpecsEnd...$1,396.95 -
Pro Circuit - 1151925 - R-304 Silencer
Pro Circuit
$206.29Pro Circuit - 18211895 - R-304 SilencerFeaturesThe compact design of the short aluminum canister offers optimum performance gains and is recommended for closed-course racing onlyHex head screws are...$206.29 -
Pro Circuit - 1051912 - 304 Silencer
Pro Circuit
$205.95Pro Circuit - 18211898 - 304 SilencerFeaturesLonger body design helps to reduce noise output6061 T6 brushed aluminum silencer bodyStainless steel inlet tube and end-capTig and mig welded for strength...$205.95 -
Pro Circuit - 1351925 - Spark Arrestor Silencer
Pro Circuit
$232.95Pro Circuit - 18211897 - Spark Arrestor SilencerFeaturesU.S. Forest Service approved and will reduce your bike's noise level at or near 96dB on most modelsInternal metal baffle, chambers, and sound...$232.95 -
Pro Circuit - 0121945A - T-6 Muffler
Pro Circuit
$799.95Pro Circuit - 18211891 - T-6 MufflerFeaturesConstructed of stainless steel throughout the mid-pipe and end-cap while the canister is constructed of aluminum for increased durabilityMachined aluminum...$799.95 -
Pro Circuit - 0761985 - Works Pipe
Pro Circuit
$337.95Pro Circuit - 18201880 - Works PipeFeaturesDurable construction conforms to the natural shape of the motorcycle for exceptional fit and performanceReinforced brackets and stingers prevent cracking,...$337.95 -
Pro Circuit - 0121945G - T-6 Exhaust
Pro Circuit
$1,089.95Pro Circuit - 18201845 - T-6 ExhaustFeaturesComes with a removable United States Forest Service (USFS) Approved Spark Arrestor making it easy to alternate between off-road and closed course...$1,089.95 -
Pro Circuit - 0351845FP - Ti-6 Pro Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201836 - Ti-6 Pro ExhaustFeaturesCreated as a full race system, the Ti-6 Pro is designed to increase performance and help professional racers pass AMA/FIM sound regulationsSpecsEnd...$1,396.95 -
Out of stock
Pro Circuit - 1051925 - 304 Silencer
Pro Circuit
$205.95Pro Circuit - 18211894 - 304 SilencerFeaturesLonger body design helps to reduce noise output6061 T6 brushed aluminum silencer bodyStainless steel inlet tube and end-capTig and mig welded for strength...$205.95 -
Out of stock
Pro Circuit - 0351845F - Ti-6 Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201835 - Ti-6 ExhaustFeaturesConstructed of titanium throughout the head pipe, mid pipe and canisterThe ideal exhaust for any off-road or closed course racer looking for improved...$1,396.95 -
Out of stock
Pro Circuit - 1031865 - 304 Silencer
Pro Circuit
$205.95Pro Circuit - 18211879 - 304 SilencerFeaturesLonger body design helps to reduce noise output6061 T6 brushed aluminum silencer bodyStainless steel inlet tube and end-capTig and mig welded for strength...$205.95 -
Out of stock
Pro Circuit - 0151845A - T-6 Muffler
Pro Circuit
$649.95Pro Circuit - 18211878 - T-6 MufflerFeaturesConstructed of stainless steel throughout the mid-pipe and end-cap while the canister is constructed of aluminum for increased durabilityMachined aluminum...$649.95 -
Pro Circuit - PC4022-0003 - Replacement End Cap - Carbon Fiber - Ti-5/Ti-6
Pro Circuit
$132.95Pro Circuit - 18600811 - Replacement End Cap - Carbon Fiber - Ti-5/Ti-6FeaturesSpecsMaterialCarbon FiberProduct NameEnd CapColor/FinishBlackRiding...$132.95 -
Pro Circuit - 1351912 - Spark Arrestor Silencer
Pro Circuit
$232.95Pro Circuit - 18211901 - Spark Arrestor SilencerFeaturesU.S. Forest Service approved and will reduce your bike's noise level at or near 96dB on most modelsInternal metal baffle, chambers, and sound...$232.95 -
Pro Circuit - 0851925 - Platinum Pipe
Pro Circuit
$365.95Pro Circuit - 18201857 - Platinum PipeFeaturesStamped AKDQ high quality carbon steel constructionHand welded and pounded seamsReinforced mounting brackets and stingerElectroless nickel plating...$365.95 -
Pro Circuit - 0751912 - Works Pipe
Pro Circuit
$337.95Pro Circuit - 18201858 - Works PipeFeaturesDurable construction conforms to the natural shape of the motorcycle for exceptional fit and performanceReinforced brackets and stingers prevent cracking,...$337.95 -
Out of stock
Pro Circuit - 0151845G - T-6 Exhaust
Pro Circuit
$1,089.95Pro Circuit - 18201834 - T-6 ExhaustFeaturesComes with a removable United States Forest Service (USFS) Approved Spark Arrestor making it easy to alternate between off-road and closed course...$1,089.95 -
Out of stock
Pro Circuit - 0321945F - Ti-6 Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201846 - Ti-6 ExhaustFeaturesConstructed of titanium throughout the head pipe, mid pipe and canisterThe ideal exhaust for any off-road or closed course racer looking for improved...$1,396.95 -
Out of stock
Pro Circuit - 0851812 - Platinum Pipe
Pro Circuit
$352.95Pro Circuit - 18201833 - Platinum PipeFeaturesStamped AKDQ high quality carbon steel constructionHand welded and pounded seamsReinforced mounting brackets and stingerElectroless nickel plating...$352.95 -
Out of stock
Pro Circuit - 0751812 - Works Pipe
Pro Circuit
$337.95Pro Circuit - 18201832 - Works PipeFeaturesDurable construction conforms to the natural shape of the motorcycle for exceptional fit and performanceReinforced brackets and stingers prevent cracking,...$337.95 -
Pro Circuit - 1061985 - 304 Silencer
Pro Circuit
$205.95Pro Circuit - 18211929 - 304 SilencerFeaturesLonger body design helps to reduce noise output6061 T6 brushed aluminum silencer bodyStainless steel inlet tube and end-capTig and mig welded for strength...$205.95 -
Pro Circuit - 1361985 - Spark Arrestor Silencer
Pro Circuit
$232.95Pro Circuit - 18211931 - Spark Arrestor SilencerFeaturesU.S. Forest Service approved and will reduce your bike's noise level at or near 96dB on most modelsInternal metal baffle, chambers, and sound...$232.95 -
Pro Circuit - 0141925A - T-6 Muffler
Pro Circuit
$799.95Pro Circuit - 18211961 - T-6 MufflerFeaturesConstructed of stainless steel throughout the mid-pipe and end-cap while the canister is constructed of aluminum for increased durabilityMachined aluminum...$799.95 -
Pro Circuit - 0131925A - T-6 Muffler
Pro Circuit
$799.95Pro Circuit - 18211893 - T-6 MufflerFeaturesConstructed of stainless steel throughout the mid-pipe and end-cap while the canister is constructed of aluminum for increased durabilityMachined aluminum...$799.95 -
Out of stock
Pro Circuit - 0111312F - T-6 Exhaust
Pro Circuit
$487.95Pro Circuit - 18201534 - T-6 ExhaustFeaturesComes with a removable United States Forest Service (USFS) Approved Spark Arrestor making it easy to alternate between off-road and closed course...$487.95 -
Out of stock
Pro Circuit - 0332145F - Ti-6 Exhaust
Pro Circuit
$1,487.95Pro Circuit - 18201981 - Ti-6 ExhaustFeaturesAsymmetrical muffler configuration for increased packing volumeMost systems equipped with a RC-4 Resonance Chamber for reduced sound outputMachined mid...$1,487.95 -
Pro Circuit - 0132011F - T-6 Exhaust
Pro Circuit
$549.95Pro Circuit - 18201952 - T-6 ExhaustFeaturesComes with a removable United States Forest Service (USFS) Approved Spark Arrestor making it easy to alternate between off-road and closed course...$549.95 -
Pro Circuit - 4H00050 - T-4 Stainless Exhaust
Pro Circuit
$370.95Pro Circuit - 18201961 - T-4 Stainless ExhaustFeaturesExtensively track- and dyno-testedSteel Allen head screws make repacking an easy taskExclusive E-glass pillow packingIncludes USFS-approved spark...$370.95 -
Pro Circuit - 0321545FP - Ti-6 Pro Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201600 - Ti-6 Pro ExhaustFeaturesCreated as a full race system, the Ti-6 Pro is designed to increase performance and help professional racers pass AMA/FIM sound...$1,396.95 -
Pro Circuit - 0321525FP - Ti-6 Pro Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201598 - Ti-6 Pro ExhaustFeaturesCreated as a full race system, the Ti-6 Pro is designed to increase performance and help professional racers pass AMA/FIM sound regulationsSpecsPipe...$1,396.95 -
Pro Circuit - 0122030A - T-6 Muffler - KLX300R
Pro Circuit
$512.95Pro Circuit - 18212015 - T-6 Muffler - KLX300RFeaturesStainless steel mid pipeA United States Forest Service approved spark arrestor comes equipped making it easy to alternate between off-road and...$512.95 -
Out of stock
Pro Circuit - 0122014F - T-6 Exhaust
Pro Circuit
$549.95Pro Circuit - 18201980 - T-6 ExhaustFeaturesAsymmetrical muffler configuration for increased packing volumeMost systems equipped with a RC-4 Resonance Chamber for reduced sound outputMachined mid...$549.95 -
Pro Circuit - 0120911F - T-6 Exhaust
Pro Circuit
$549.95Pro Circuit - 18201972 - T-6 ExhaustFeaturesComes with a removable United States Forest Service (USFS) Approved Spark Arrestor making it easy to alternate between off-road and closed course...$549.95 -
Pro Circuit - 0322125F - Ti-6 Exhaust
Pro Circuit
$1,396.95Pro Circuit - 18201976 - Ti-6 ExhaustFeaturesEquipped with RC-4 Resonance ChamberLighter weight than OEM systemHigh-grade titanium material used throughoutCarbon fiber end-capMachined aluminum...$1,396.95 -
Pro Circuit - 1161985K - Ti-2 Silencer
Pro Circuit
$446.95Pro Circuit - 18211938 - Ti-2 SilencerFeaturesOffers the "factory" look and appearance while reducing weightOptimum performance gainsCNC-machined aluminum mounting bracketFor closed-course racing...$446.95 -
Pro Circuit - 1161985 - R-304 Silencer
Pro Circuit
$206.29Pro Circuit - 18211930 - R-304 SilencerFeaturesThe compact design of the short aluminum canister offers optimum performance gains and is recommended for closed-course racing onlyHex head screws are...$206.29 -
Pro Circuit - 1131985K - Ti-2 Silencer
Pro Circuit
$446.95Pro Circuit - 18211937 - Ti-2 SilencerFeaturesOffers the "factory" look and appearance while reducing weightOptimum performance gainsCNC-machined aluminum mounting bracketFor closed-course racing...$446.95 -
Pro Circuit - 0151925A - T-6 Muffler
Pro Circuit
$649.95Pro Circuit - 18211934 - T-6 MufflerFeaturesConstructed of stainless steel throughout the mid-pipe and end-cap while the canister is constructed of aluminum for increased durabilityMachined aluminum...$649.95 -
Pro Circuit - 1131865K - Ti-2 Silencer
Pro Circuit
$446.95Pro Circuit - 18211880 - Ti-2 SilencerFeaturesOffers the "factory" look and appearance while reducing weightOptimum performance gainsCNC-machined aluminum mounting bracketFor closed-course racing...$446.95 -
Pro Circuit - 0752030 - Works Pipe
Pro Circuit
$349.95Pro Circuit - 18201923 - Works PipeFeaturesDurable construction conforms to the natural shape of the motorcycle for exceptional fit and performanceReinforced brackets and stingers prevent cracking,...$349.95
Pro Circuit Performance Exhaust Systems – Motorcycle Exhausts, Racing Engine Components & Power Upgrade Kits
Pro Circuit has built a global reputation as one of the most influential brands in motocross and off-road motorcycle performance engineering. The company designs race-proven components that enhance engine output, throttle response and overall riding performance. Their product lineup includes advanced motorcycle exhaust systems, titanium silencers and precision-machined performance parts used by professional race teams and enthusiasts alike.
Among the brand’s most recognized products are the Ti-6 Pro titanium exhaust systems, T-6 stainless steel exhaust systems and Works Pipe performance expansion chambers. Riders also rely on R-304 silencers, spark arrestor silencers and Platinum series exhaust pipes designed to optimize power delivery across various engine platforms. In addition to exhaust solutions, Pro Circuit manufactures a range of racing components including clutch springs, water pump covers, linkage arms, axle blocks and throttle tubes that support durability and precision performance in competitive riding conditions.
Beyond exhaust technology, Pro Circuit provides performance-focused upgrades that enhance both engine reliability and chassis control. Products such as ignition covers, shift levers, clutch covers and fuel mixture screws help riders fine-tune their machines for optimal efficiency and responsiveness. Whether installing a motocross performance exhaust, upgrading engine hardware or improving throttle control with precision components, Pro Circuit continues to deliver race-developed solutions trusted by professional riders and off-road enthusiasts worldwide.