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  • FMF Powercore 4 Muffler 041274

    FMF Powercore 4 Muffler 041274

    Powercore 4 Muffler Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end...
    $400.95
  • FMF Powercore 4 Muffler 042123

    FMF Powercore 4 Muffler 042123

    Powercore 4 Muffler Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end...
    $400.95
  • FMF Powercore 4 Muffler 045135

    FMF Powercore 4 Muffler 045135

    Powercore 4 Muffler Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end...
    $400.95
  • FMF Powercore 4 Muffler 042161

    FMF Powercore 4 Muffler 042161

    Powercore 4 Muffler The Mini Powercore 4 is the best bang for your buck performance bolt on for your mini, Features a Hi-Flo stainless steel core and formed end caps, an aircraft grade aluminum canister and a durable stainless steel header, Hi-Flo Core...
    $290.95
  • FMF Q4 Muffler 041332

    FMF Q4 Muffler 041332

    Q4 Muffler The Q series features advanced engineering to precisely locate baffles and chambers to absorb sound, Less mass to enhance power-to-weight ratio, Quiet power with minimal sacrifice for performance, Developed over years of championship off-road...
    $380.95
  • FMF Powercore 4 Muffler 044312

    FMF Powercore 4 Muffler 044312

    Powercore 4 Muffler Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end...
    $360.95
  • FMF Powercore 2 Shorty Silencer 025123

    FMF Powercore 2 Shorty Silencer 025123

    Powercore 2 Shorty Silencer The Shorty Silencer is the most desirable silencer for supercross performance, Overall length of canister and core is shorter to improve the hit of your machine, The SST Shorty Silencer is the heart and soul of the SST power...
    $200.95
  • FMF Powercore 2 Silencer 025134

    FMF Powercore 2 Silencer 025134

    Powercore 2 Silencer The most popular 2-stroke silencers in FMF's arsenal, The elliptically shaped bodies with perforated core perform well in any condition, Equipped with a Performance Flow end cap and nickel-plated front stinger
    $200.95
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 042259

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 042259

    Factory 4.1 RCT Muffler - Anodized Titanium The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary...
    $750.95
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 042286

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 042286

    Factory 4.1 RCT Muffler - Anodized Titanium The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary...
    $750.95
  • FMF Q4 HEX Muffler 042296

    FMF Q4 HEX Muffler 042296

    Q4 HEX Muffler The Q4 employs intricate chambers, baffles and proprietary multistage packing material, With the Q4 you don’t need to hear the power, just feel the power!, Less sound equals more ground, Power gains throughout the entire rpm range, Spark...
    $450.95
  • FMF PowerCore 4 HEX Muffler 042310

    FMF PowerCore 4 HEX Muffler 042310

    PowerCore 4 HEX Muffler Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides...
    $400.95
  • FMF PowerCore 4 HEX Muffler 044404

    FMF PowerCore 4 HEX Muffler 044404

    PowerCore 4 HEX Muffler Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides...
    $400.95
  • FMF PowerCore 4 HEX Muffler 044396

    FMF PowerCore 4 HEX Muffler 044396

    PowerCore 4 HEX Muffler Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides...
    $400.95
  • FMF PowerCore 4 HEX Muffler 044397

    FMF PowerCore 4 HEX Muffler 044397

    PowerCore 4 HEX Muffler Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides...
    $400.95
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 044429

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 044429

    Factory 4.1 RCT Muffler - Anodized Titanium The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary...
    $800.95
  • FMF PowerCore 4 HEX Muffler 045553

    FMF PowerCore 4 HEX Muffler 045553

    PowerCore 4 HEX Muffler Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides...
    $400.95
  • FMF PowerBomb Header 044298

    FMF PowerBomb Header 044298

    PowerBomb Header Utilize FMF's patented module precisely located at the initial stage of the header, Position "Bomb" increases performance; horsepower is increased as much as 10%, Act as "pre-muffler" helping to lower the decibel output, The expansion...
    $250.95
  • FMF PowerBomb Header 044432

    FMF PowerBomb Header 044432

    PowerBomb Header Utilize FMF's patented module precisely located at the initial stage of the header, Position "Bomb" increases performance; horsepower is increased as much as 10%, Act as "pre-muffler" helping to lower the decibel output, The expansion...
    $325.95
  • FMF Fatty Pipe 021036

    FMF Fatty Pipe 021036

    Fatty Pipe Computer designed and dyno tested to make power gains where each machine needs them the most, Tru-Flo stamping process ensures a perfect fit and optimum performance, Constructed of strong 19-gauge steel with a nickel-plated finish
    $300.95
  • FMF Fatty Pipe 022040

    FMF Fatty Pipe 022040

    Fatty Pipe Computer designed and dyno tested to make power gains where each machine needs them the most, Tru-Flo stamping process ensures a perfect fit and optimum performance, Constructed of strong 19-gauge steel with a nickel-plated finish
    $300.95
  • FMF Fatty Pipe 024041

    FMF Fatty Pipe 024041

    Fatty Pipe Computer designed and dyno tested to make power gains where each machine needs them the most, Tru-Flo stamping process ensures a perfect fit and optimum performance, Constructed of strong 19-gauge steel with a nickel-plated finish
    $300.95
  • FMF Fatty Pipe 024053

    FMF Fatty Pipe 024053

    Fatty Pipe Computer designed and dyno tested to make power gains where each machine needs them the most, Tru-Flo stamping process ensures a perfect fit and optimum performance, Constructed of strong 19-gauge steel with a nickel-plated finish
    $330.95
  • FMF Gnarly Pipe 021053

    FMF Gnarly Pipe 021053

    Gnarly Pipe 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 to withstand the harsh elements, this...
    $300.95
  • FMF Fatty Pipe 023055

    FMF Fatty Pipe 023055

    Fatty Pipe Computer designed and dyno tested to make power gains where each machine needs them the most, Tru-Flo stamping process ensures a perfect fit and optimum performance, Constructed of strong 19-gauge steel with a nickel-plated finish
    $300.95
  • FMF Powercore 4 Exhaust 044136

    FMF Powercore 4 Exhaust 044136

    Powercore 4 Exhaust Hi-Flo end cap boosts all-around performance, Computer designed and dyno-tested for every 4-stroke application, Enhanced sonic evacuation delivers a higher flow of exhaust gases, which increases power, A stainless steel mid-pipe mates...
    $280.95
  • FMF Q4 HEX Muffler 045556

    FMF Q4 HEX Muffler 045556

    Q4 HEX Muffler The Q4 employs intricate chambers, baffles and proprietary multistage packing material, With the Q4 you don’t need to hear the power, just feel the power!, Less sound equals more ground, Power gains throughout the entire rpm range, Spark...
    $450.95
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045561

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045561

    Factory 4.1 RCT Muffler - Anodized Titanium The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary...
    $650.95
  • FMF Powercore 2.1 Muffler - Titanium 024063

    FMF Powercore 2.1 Muffler - Titanium 024063

    Powercore 2.1 Muffler - Titanium Built to provide excellent power for today’s tracks geared toward 4-stroke machines, Smooth power curve throughout the RPM range, Large diameter canister for more tenability and longer lasting packing life, Delivers a...
    $450.95
  • FMF Powercore 2.1 Muffler - Aluminum 025177

    FMF Powercore 2.1 Muffler - Aluminum 025177

    Powercore 2.1 Muffler - Aluminum Built to provide excellent power for today’s tracks geared toward 4-stroke machines, Smooth power curve throughout the RPM range, Large diameter canister for more tenability and longer lasting packing life, Delivers a...
    $240.95
  • FMF Turbinecore 2.1 Muffler 025179

    FMF Turbinecore 2.1 Muffler 025179

    Turbinecore 2.1 Muffler The straight through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail proven unrestricted power, The 2.1 utilizes a shape...
    $270.95
  • FMF PowerCore 4 HEX Muffler 042327

    FMF PowerCore 4 HEX Muffler 042327

    PowerCore 4 HEX Muffler Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides...
    $400.95
  • FMF Turbinecore 2 Silencer 024066

    FMF Turbinecore 2 Silencer 024066

    Turbinecore 2 Silencer Uses the exclusive "Turbine Dampening System", Straight-through design of the spark arrestor canister and the Performance Flow stainless steel end cap ensure strength, durability and unrestricted power
    $220.95
  • FMF Powercore 2 Silencer 025180

    FMF Powercore 2 Silencer 025180

    Powercore 2 Silencer The most popular 2-stroke silencers in FMF's arsenal, The elliptically shaped bodies with perforated core perform well in any condition, Equipped with a Performance Flow end cap and nickel-plated front stinger
    $200.95
  • FMF Turbinecore 2 Silencer 025201

    FMF Turbinecore 2 Silencer 025201

    Turbinecore 2 Silencer Uses the exclusive "Turbine Dampening System", Straight-through design of the spark arrestor canister and the Performance Flow stainless steel end cap ensure strength, durability and unrestricted power
    $220.95
  • FMF Turbinecore 2 Silencer 025207

    FMF Turbinecore 2 Silencer 025207

    Turbinecore 2 Silencer Uses the exclusive "Turbine Dampening System", Straight-through design of the spark arrestor canister and the Performance Flow stainless steel end cap ensure strength, durability and unrestricted power
    $220.95
  • FMF Turbinecore 2.1 Muffler 025220

    FMF Turbinecore 2.1 Muffler 025220

    Turbinecore 2.1 Muffler The straight through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail proven unrestricted power, The 2.1 utilizes a shape...
    $270.95
  • FMF Powercore 2 Shorty Silencer 025225

    FMF Powercore 2 Shorty Silencer 025225

    Powercore 2 Shorty Silencer The Shorty Silencer is the most desirable silencer for supercross performance, Overall length of canister and core is shorter to improve the hit of your machine, The SST Shorty Silencer is the heart and soul of the SST power...
    $200.95
  • FMF Turbinecore 2 Silencer 025227

    FMF Turbinecore 2 Silencer 025227

    Turbinecore 2 Silencer Uses the exclusive "Turbine Dampening System", Straight-through design of the spark arrestor canister and the Performance Flow stainless steel end cap ensure strength, durability and unrestricted power
    $220.95
  • FMF Factory 4.1 RCT Muffler - Aluminum 044443

    FMF Factory 4.1 RCT Muffler - Aluminum 044443

    Factory 4.1 RCT Muffler - Aluminum The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their...
    $650.95
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 044445

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 044445

    Factory 4.1 RCT Muffler - Anodized Titanium The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary...
    $850.95
  • FMF Turbinecore 2.1 Muffler 025231

    FMF Turbinecore 2.1 Muffler 025231

    Turbinecore 2.1 Muffler The straight through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail proven unrestricted power, The 2.1 utilizes a shape...
    $270.95

Exhaust Systems

Motorcycle & Powersports Exhaust Systems

An aftermarket exhaust system is one of the most rewarding upgrades you can make to any motorcycle. The power gains are real and immediate. The weight reduction is meaningful. The sound is something you hear and feel on every ride from the moment you start the engine. But beyond the performance and the experience, an aftermarket exhaust is also one of the most visible expressions of how you have built your machine and what you want it to say about you as a rider. From a lightweight titanium two-stroke expansion chamber on a race-prepped motocross bike to a deep-throated slip-on on a streetfighter or a full performance system on an adventure tourer, the exhaust is the modification that defines the character of a build as much as anything else on the machine.

Mad Lads Moto stocks exhaust systems and exhaust components for dirt bikes, motocross bikes, enduro machines, street bikes, adventure tourers, and dual sport motorcycles. We carry full exhaust systems that replace everything from the header to the muffler, slip-on mufflers that bolt onto the existing mid-pipe for a simpler upgrade, two-stroke expansion chambers, headers and mid-pipes, and all of the exhaust accessories needed to complete an installation or maintain an existing system. Here is how we have organized the section to make finding the right exhaust straightforward:

  • Full Exhaust Systems - Complete header-back exhaust systems that replace the entire OEM exhaust from the head pipe through the muffler, delivering the maximum power gains, the most significant weight reduction, and the most dramatic change in exhaust character of any exhaust upgrade option.
  • Slip-On Mufflers - Bolt-on muffler replacements that attach to the existing OEM or aftermarket mid-pipe for a simpler installation with a meaningful improvement in sound and a moderate power gain at a lower cost than a full system.
  • 2-Stroke Expansion Chambers - Tuned expansion chamber pipes for two-stroke dirt bikes and motocross bikes where the exhaust pipe is a fundamental part of the engine's power delivery system and selection directly affects where in the RPM range power comes on and how broadly it is delivered.
  • Headers & Pipes - Replacement and performance header pipes and mid-pipes that improve exhaust flow from the cylinder head and form the foundation of a performance exhaust build, available individually for riders building a custom exhaust combination.
  • Gaskets, Shields & Hardware - Exhaust gaskets, heat shields, exhaust springs, mounting hardware, end caps, quiet cores, spark arrestors, and all of the accessories needed to complete an exhaust installation cleanly and maintain an existing system over time.

Choosing the right exhaust for your machine and your riding style requires understanding a few key concepts that make the difference between an upgrade that transforms your ride and one that delivers less than you expected. Full exhaust systems deliver the best power gains because they address the restrictive factory header pipe as well as the muffler. Slip-on mufflers are easier to install and cost less but leave the restrictive stock header in place, limiting how much power the upgrade can unlock. On four-stroke bikes, pairing any exhaust upgrade with a fuel management device or ECU flash ensures the fuel delivery matches the new airflow and maximizes the power gain while protecting the engine from running lean. On two-stroke bikes, exhaust selection affects power delivery characteristics as much as peak output, and matching the pipe to your riding style is as important as matching it to your engine. Spark arrestor requirements apply on most public lands and national forests in the United States, and confirming that any exhaust system you purchase either includes a USFS-approved spark arrestor or is compatible with one is essential before riding on public land. We stock exhaust systems and components for Honda, Yamaha, Kawasaki, Suzuki, KTM, Husqvarna, Beta, GasGas, and more. Use our year, make, and model fitment tool to find exhaust systems confirmed to fit your specific machine before you order.

What exhaust upgrade will give me the most power on my four-stroke dirt bike?

A full exhaust system combined with a fuel management tune delivers the most power of any exhaust upgrade on a four-stroke dirt bike. The full system addresses both the restrictive factory header pipe and the muffler, improving exhaust flow throughout the entire system rather than just at the muffler end. Pairing the exhaust with a fuel tuner or ECU flash calibrated for the specific exhaust recalibrates fuel delivery to match the improved airflow and unlocks the full power potential of the exhaust upgrade. A slip-on muffler alone delivers a moderate power improvement and a noticeable change in exhaust note but leaves the stock header in place, limiting the overall gain compared to a full system. For riders who want maximum performance from their exhaust upgrade, a full system with a matched fuel tune is the correct combination. For riders who want a meaningful improvement at a lower cost and with simpler installation, a quality slip-on from a reputable manufacturer delivers good value.

Do I need a spark arrestor on my dirt bike exhaust and where is it required?

A USFS-approved spark arrestor is required on most public lands managed by the United States Forest Service, Bureau of Land Management, and many state-managed OHV areas across the country. The requirement applies to all off-road vehicles including dirt bikes, ATVs, and UTVs operating on those lands regardless of whether the exhaust is stock or aftermarket. Many aftermarket exhaust systems designed for off-road use include an integrated spark arrestor that meets USFS requirements. Systems that do not include a spark arrestor are typically compatible with aftermarket spark arrestors that install in the end of the muffler. Before purchasing any aftermarket exhaust for a machine that will be ridden on public land, confirm that the system either includes a USFS-approved spark arrestor or specifies which aftermarket spark arrestors are compatible with that specific muffler. Riding on public land without a required spark arrestor can result in significant fines and in some cases confiscation of the machine.

How do I choose between a full exhaust system and a slip-on muffler for my motorcycle?

The decision between a full exhaust system and a slip-on muffler comes down to your performance goals, your budget, and how much installation complexity you want to take on. A full exhaust system replaces the header, mid-pipe if applicable, and muffler for maximum power gains, the most significant weight reduction, and the most dramatic change in exhaust note. It requires more installation time and costs more upfront but delivers results that a slip-on cannot match. A slip-on muffler replaces only the muffler while retaining the stock header and mid-pipe. Installation is straightforward on most bikes, cost is lower, the exhaust note improvement is immediate and noticeable, and the power gain is real if modest compared to a full system. For riders who want the best possible performance and are building the bike seriously, a full system is the right investment. For riders who want an improved exhaust note, a small power gain, and a weight reduction without the cost and complexity of a full system, a slip-on from a quality manufacturer is a smart and satisfying upgrade.
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