FMF is the leader in high performance quiet technology and our Q4 HEX is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don’t need to hear the power, just feel the power!
-Less sound equals more ground
-Meets USFS and FIM World Enduro sound regulations
-Power gains throughout the entire rpm range
-Spark arrestor included
-Pounds lighter than stock
-Rugged design for off-road endurance
-Only US manufacturer to offer dedicated quiet exhaust systems
-MADE IN THE USA
-See Features Tab -> Fitment for header compatibility
Powercore 4 HEX 045589
Regular price
$399.99
/
045589
When designing the PowerCore 4 HEX, we looked at our top of the line products to deliver race-inspired performance at an economical price. The end result is a quality muffler with improved torque, increased horsepower and rugged durability all at a price that won't break the bank.
-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 for higher flow and increased power.
-Includes removable spark arrestor.
-See Features Tab -> Fitment for header compatibility
SX Style MegaBomb Header 042379
Regular price
$474.99
/
042379
Stainless MegaBomb 041598
Regular price
$374.99
/
041598
This is used for a single sided exhaust system except part # 014553
Titanium Megabomb Plus 045623
Regular price
$474.99
/
045623
TurbineCore 2 020309
Regular price
$219.99
/
020309
Our best selling Turbinecore 2 uses the exclusive "Turbine Dampening System". This top-notch product has well earned its U.S. Forest legal status. 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 Turbinecore 2 is the #1 spark arrestor in the world.
TurbineCore 2 021017
Regular price
$219.99
/
021017
Our best selling Turbinecore 2 uses the exclusive "Turbine Dampening System". This top-notch product has well earned its U.S. Forest legal status. 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 Turbinecore 2 is the #1 spark arrestor in the world.
TurbineCore 2 020328
Regular price
$219.99
/
020328
Our best selling Turbinecore 2 uses the exclusive "Turbine Dampening System". This top-notch product has well earned its U.S. Forest legal status. 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 Turbinecore 2 is the #1 spark arrestor in the world.
TurbineCore 2 021012
Regular price
$219.99
/
021012
Our best selling Turbinecore 2 uses the exclusive "Turbine Dampening System". This top-notch product has well earned its U.S. Forest legal status. 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 Turbinecore 2 is the #1 spark arrestor in the world.
Shorty Big Bore 025155
Regular price
$199.99
/
025155
Powercore 2 025134
Regular price
$199.99
/
025134
The Powercore 2 is the measure which others aim for. With its lightweight extruded aluminum oval canister mated to a perforated core, this silencer is above the competition. The Powercore 2 silencer provides a strong performance edge for any 2-stroke machine and the performance flow end cap and front stinger are stainless steel for unbeatable durability and an unmatched look.
Shorty 020215
Regular price
$199.99
/
020215
Taking the proven success of the Powercore 2, FMF created the Powercore 2 Shorty, with a shorter inner core length and aluminum canister. This design results in a finely tuned bolt on performance silencer that maximizes bottom and mid rpm power. An excellent choice for tight tracks and supercross track applications.
Powercore 2 020207
Regular price
$199.99
/
020207
The Powercore 2 is the measure which others aim for. With its lightweight extruded aluminum oval canister mated to a perforated core, this silencer is above the competition. The Powercore 2 silencer provides a strong performance edge for any 2-stroke machine and the performance flow end cap and front stinger are stainless steel for unbeatable durability and an unmatched look.
Powercore 2 020205
Regular price
$199.99
/
020205
The Powercore 2 is the measure which others aim for. With its lightweight extruded aluminum oval canister mated to a perforated core, this silencer is above the competition. The Powercore 2 silencer provides a strong performance edge for any 2-stroke machine and the performance flow end cap and front stinger are stainless steel for unbeatable durability and an unmatched look.
Gnarly 023060
Regular price
$299.99
/
023060
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 is the pipe for you. Strong and rugged, this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain.
-Nickel plating is an FMF trademark and has been ‘copied’ by everyone making it the most imitated expansion chamber in the world.
-Super strong18 gauge steel construction makes it GNARLY!
-O-Rings Included
Gnarly 025070
Regular price
$299.99
/
025070
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 is the pipe for you. Strong and rugged, this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain.
-Nickel plating is an FMF trademark and has been ‘copied’ by everyone making it the most imitated expansion chamber in the world.
-Super strong18 gauge steel construction makes it GNARLY!
-O-Rings Included
Gnarly 025004
Regular price
$349.99
/
025004
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 is the pipe for you. Strong and rugged, this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain.
-Nickel plating is an FMF trademark and has been ‘copied’ by everyone making it the most imitated expansion chamber in the world.
-Super strong18 gauge steel construction makes it GNARLY!
-O-Rings Included
Gnarly 020082
Regular price
$349.99
/
020082
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 is the pipe for you. Strong and rugged, this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain.
-Nickel plating is an FMF trademark and has been ‘copied’ by everyone making it the most imitated expansion chamber in the world.
-Super strong18 gauge steel construction makes it GNARLY!
-O-Rings Included
Gnarly 020079
Regular price
$349.99
/
020079
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 is the pipe for you. Strong and rugged, this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain.
-Nickel plating is an FMF trademark and has been ‘copied’ by everyone making it the most imitated expansion chamber in the world.
-Super strong18 gauge steel construction makes it GNARLY!
-O-Rings Included
Gnarly 025218
Regular price
$299.99
/
025218
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 is the pipe for you. Strong and rugged, this aggressive pipe dishes out handfuls of torque and bottom to mid range pull needed for late model 200cc through 500cc machines and the rigors of the off road domain.
-Nickel plating is an FMF trademark and has been ‘copied’ by everyone making it the most imitated expansion chamber in the world.
-Super strong18 gauge steel construction makes it GNARLY!
-O-Rings Included
Fatty 025303
Regular price
$289.99
/
025303
Our Fatty Gold Series pipe broadens the powerband and provides a healthy power increase everywhere. Improved throttle response, a linear powerband and enhanced over-rev all add up to a pipe that everyone will benefit from. The Fatty pipe is our most popular pipe for that same reason. If you’re riding trails, tracks or in the open desert, this pipe has what you’re looking for.
Number one pipe on the market.
FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
Includes O-rings.
PowerBomb 043107
Regular price
$219.97
/
043107
The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range.
Powercore 2 025281
Regular price
$199.99
/
025281
The Powercore 2 is the measure which others aim for. With its lightweight extruded aluminum oval canister mated to a perforated core, this silencer is above the competition. The Powercore 2 silencer provides a strong performance edge for any 2-stroke machine and the performance flow end cap and front stinger are stainless steel for unbeatable durability and an unmatched look.
YZ250F'10-11 SLIP FIT FLANGE KIT (044316) 040667
Regular price
$29.99
/
040667
·Need to replace your header flange hardware? We are now offering 2 or 3 piece flange assembly kits for all model machines. *Spring not included* Spring kit part #011396*
HON XR70'01-03/CRF70'04 P-CORE 4 S/A MFLR W/SS HEADER 041017
Regular price
$299.99
/
041017
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 Version, the Mini Powercore 4 features a Hi-Flo stainless steel core and formed end caps, an aircraft grade aluminum canister and a durable stainless steel header. Its pounds lighter than stock and you will swear the motor has been bored and stroked with the first twist of the throttle.
Hi-Flo Core and End Cap
Pounds lighter than stock
HON XR70'01-03/CRF70'04 P-CORE 4 MFLR W/SS HEADER 041016
Regular price
$279.99
/
041016
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 Version, the Mini Powercore 4 features a Hi-Flo stainless steel core and formed end caps, an aircraft grade aluminum canister and a durable stainless steel header. Its pounds lighter than stock and you will swear the motor has been bored and stroked with the first twist of the throttle.
Hi-Flo Core and End Cap
Pounds lighter than stock
Fatty 020135
Regular price
$309.99
/
020135
With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.
-More tractable power, improved throttle control
-Provides power gains throughout entire power band
-Carbon steel with a nickel plated finish for maximum durability
-FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
-Can be used with FMF or stock silencer (unless noted)
-Our most popular 2-stroke pipe
-O-Rings Included
Fatty 020104
Regular price
$309.99
/
020104
With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.
-More tractable power, improved throttle control
-Provides power gains throughout entire power band
-Carbon steel with a nickel plated finish for maximum durability
-FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
-Can be used with FMF or stock silencer (unless noted)
-Our most popular 2-stroke pipe
-O-Rings Included
Fatty 022034
Regular price
$289.99
/
022034
With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.
-More tractable power, improved throttle control
-Provides power gains throughout entire power band
-Carbon steel with a nickel plated finish for maximum durability
-FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
-Can be used with FMF or stock silencer (unless noted)
-Our most popular 2-stroke pipe
-O-Rings Included
Fatty 025202
Regular price
$299.99
/
025202
With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.
-More tractable power, improved throttle control
-Provides power gains throughout entire power band
-Carbon steel with a nickel plated finish for maximum durability
-FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
-Can be used with FMF or stock silencer (unless noted)
-Our most popular 2-stroke pipe
-O-Rings Included
Fatty 025092
Regular price
$299.99
/
025092
With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.
-More tractable power, improved throttle control
-Provides power gains throughout entire power band
-Carbon steel with a nickel plated finish for maximum durability
-FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
-Can be used with FMF or stock silencer (unless noted)
-Our most popular 2-stroke pipe
-O-Rings Included
Fatty 021036
Regular price
$299.99
/
021036
With well over 35 years of racing experience behind it, the Fatty Gold Series pipe delivers race proven performance. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you’re looking for.
-More tractable power, improved throttle control
-Provides power gains throughout entire power band
-Carbon steel with a nickel plated finish for maximum durability
-FMF Racing’s Tru-Flo stamping process ensures a perfect fit and optimum performance.
-Can be used with FMF or stock silencer (unless noted)
-Our most popular 2-stroke pipe
-O-Rings Included
PowerBomb 044244
Regular price
$249.99
/
044244
The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range.
PowerBomb 041118
Regular price
$249.99
/
041118
The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range.
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
-Available in Blue Anodized Titanium Muffler with Carbon End Cap
-Massive Power gains throughout the RPM range.
-Huge weight savings
-New RTS (Rapid Tuning System)
-FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
-See Features Tab -> Fitment for header compatibility
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
-Available in Blue Anodized Titanium Muffler with Carbon End Cap
-Massive Power gains throughout the RPM range.
-Huge weight savings
-New RTS (Rapid Tuning System)
-FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
-See Features Tab -> Fitment for header compatibility
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
-Available in Blue Anodized Titanium Muffler with Carbon End Cap
-Massive Power gains throughout the RPM range.
-Huge weight savings
-New RTS (Rapid Tuning System)
-FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
-See Features Tab -> Fitment for header compatibility
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
-Available in Blue Anodized Titanium Muffler with Carbon End Cap
-Massive Power gains throughout the RPM range.
-Huge weight savings
-New RTS (Rapid Tuning System)
-FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
-See Features Tab -> Fitment for header compatibility
FACTORY 4.1 RCT STAINLESS SL (SLIP-ON) W/ CARBON END CAP 042291
Regular price
$599.99
/
042291
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
-Available in Natural Aluminum Muffler with Carbon End Cap
-Massive Power gains throughout the RPM range.
-Huge weight savings
-New RTS (Rapid Tuning System)
-FMF uses the highest quality proprietary blend of alloy grade titanium made especially to our standards.
-See Features Tab -> Fitment for header compatibility
The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.
-Available in Blue Anodized Titanium Muffler with Carbon End Cap
-Massive Power gains throughout the RPM range.
-Huge weight savings
-New RTS (Rapid Tuning System)
-FMF uses the highest quality proprietary blend of alloy grade titanium made specifically to our standards.
-See Features Tab -> Fitment for header compatibility