Exhaust

The Powercore 4 spark arrestor muffler. FMF developed the Powercore 4 to increase the horsepower and torque throughout the entire power curve. Highest quality packing for long life. Removable spark arrestor included. Louder than the Q4. Approximately 99db stock or about 94db with optional Quiet Insert installed.

• Uses long-life muffler packing for increased packing life
• Forest Service approved spark arrester

Delayed stock from manufacturer, please ask for availability.

• The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available
• Constructed from aircraft grade aluminum and high strength stainless steel
• Sound rating 96dB
• Much lighter than the stock muffler

The EVO R series draws on our 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 noticeable performance gains and sound tremendously better than stock.

• Hard anodized oval shaped aluminum muffler
• TIG welded reinforced muffler bracket(s)
• 304 stainless steel mid pipe
• Red powder coated stainless steel end tip
• Lighter than stock exhaust system
• Huge horsepower and torque gains
• Sleek muffler design allows for maximum clearance
• Removable screen-type spark arrestor included
• Handmade in the USA
• 1 Year Limited Manufacturer’s Warranty

This beautifully shaped exhaust perfectly matches the Monkey’s unique character. The twin conical mufflers are constructed from stainless steel and feature titanium sleeves. Offers power gains throughout the entire rpm range along with a reduced weight. The sporty but classic appearance can be further enhanced by adding the specially designed carbon fiber heat shield.

The Hi-Output Slip-on gives the bantamweight Monkey a heavyweight punch with a deep throaty growl and a beautiful stainless brushed finish.

• 3/4 System; Mid-pipes and muffler
• CNC Machined Billet end cap
• Laser engraved logo badge
• Laser-cut chassis cover
• 3 lbs lighter than stock

• Oval muffler body with single turn-down polished aluminum end cap
• Maximized internal muffler volume for exhaust flow
• Straight, single-core baffle
• Can accept low-volume sound insert
• Large volume of packing material
• Straight baffle for ample flow
• Bolt-on design for easy installation

The RS-2 is a potent and versatile design that evolved from the original TRC, engineered to provide increased power and power delivery. With a different pyramidal shape that features increased volume, the RS-2 is a quieter system with a larger core - and it offers the added bonus of outstanding performance in a value-priced package.

• Diamond-shaped Stainless steel sleeve for increased durability.
• Large core and increased muffler packing volume means quieter operation
• Stainless steel cone end-cap
• Stainless steel tail-pipe
• Weight: .39 lbs lighter than stock configuration
• USFS Approved spark arrester included

X3 EVO represents the off-road evolution: LeoVince has combined all its experience in the off-road world with cutting-edge materials and Italian design, enhancing freedom in its purest form.

The X3 EVO body is made of AISI 304 stainless steel with TIG welds handcrafted by specialized operators, to guarantee long-lasting performance. X3 EVO will allow you to face the most extreme environments and conditions because it does not fear water or mud, nor wear over time.

The LV logo is their tribute to a motorcycle culture that we have loved for 70 years and is laser etched on the body of the exhaust: it is as endless as their passion.

They manufacture the end cap in 100% real carbon, with their special 2x2 twill carbon fiber, specifically designed to resist high temperatures and make the X3 EVO even lighter.

The matte clear coating, in addition to enhancing the carbon texture, protects the end cap from wear and UV rays, keeping the X3 EVO always in a perfect shape.

The sound of X3 EVO is already unmistakable at low revs. X3 EVO has a direct interior, specially conceived to channel the exhaust gas in an optimal way, to unleash a deep sound, giving a new voice to your bike.

The X3 EVO's Spark arrester has been tested and approved by the United States Forest Service and is essential for off-road riding in compliance with regulations, with more peace of mind, more respect for the environment and more fun.

The RS-4 Race Series slip-on gives the CRF250L more power and torque, the RS-4 provides more punch at bottom end without sacrificing the mid and top power. The slip-on also removes a good amount of weight from the stock unit. Those that love the Yoshimura RS-4 sound will love the way it makes the CRF250L Rally sing!

Proudly made in the USA!

• Pentagonal-shaped sleeve
• Front muffler cap functions as a polyresonant chamber which helps reduce noise
• Two-stage stepped baffle
• Turn-out carbon fiber end-cap
• Stainless steel tail-pipe
• RS-4 stainless slip-on weight 7.8lbs vs Stock muffler weight 10.3lbs.

The Yoshimura RS-4 is a proven choice to improve the performance and sound of the Africa Twin.

Removing the stock muffler saves over 4 pounds and makes the 988cc parallel twin engine growl!

• Oval-ellipse shaped sleeve
• Yoshimura's Works Finish for increased durability & adventure friendly design
• Features an integrated inlet heat shield design for a seamless transition with the stock heat shield

Two options are available: stainless steel and carbon fiber. The stainless steel features ASIS 204 stainless steel with a special sandblasted finish giving it a titanium-like look. The carbon fiber option is the lighter than stainless steel and features a flat finish that exposes the intricate carbon fiber weave.

• CAD/CAM design for precise fit
• Techno-polymer end-cap
• Weight savings over stock exhaust
• Increased horsepower across the entire RPM range
• TIG-welded AISI 304 stainless steel link pipe
• Tuned to work with stock fuel settings

The V2 Series Slip-On muffler features an aluminum body, TIG welded components, stainless steel inlet tube and a great new look. This Lightweight Slip-On weighs approximately 5.5 lbs.

The DG Performance systems offer increased throttle response, power and torque. Standard sound level is approximately 98 db. Equipped with a US Forestry approved spark arrestor.

• Mechanical silencer that comes with an internal perf-core surrounded by packing
• The T-5 Stainless Slip-On Silencer is designed for a rider looking for an inexpensive, easy-to-install, lightweight performance silencer that can bolt right onto their stock head pipe
• Aluminum muffler brackets
• Aluminum canister
• Stainless steel mid pipe and end-cap
• TIG welded
• Asymmetric muffler design
• Removable USFS approved spark arrestor and optional insert for closed course racing

• Dual-muffler design exhaust system
• Achieves maximum performance, mass centralization, and rider usability
• Systems feature three-stage tapered headpipe for the best power gains, better throttle response and power delivery
• Vertical divider splits the exhaust gases more evenly for smoother flow to the mufflers for better mid-top power and throttle response
• Parallelogram-shaped muffler bodies increase muffler volume over the stock system for even crisper throttle response and reduced noise levels
• Systems meet AMA noise sound regulations right out of the box (AMA 2-Meter Max and Amateur 94 dB sound compliant)
• Muffler inserts are tunable to adjust power delivery and noise level

No repacking required. The LeoVince X3 Enduro is made with TIG welded stainless steel internals and aluminum outer shell. 

It features a semi-direct chamber design that is maintenance free. It's quiet too! Our own in-house testing showed an 84dB sound level using the USFS J1287 testing procedure. That is a bit louder than stock but significantly quieter than other aftermarket mufflers. 

The installed weight is approximately 8.5lbs and it includes a certified Spark-Arrester. 

This muffler requires a stock muffler joint gasket when used with either the stock headpipe or the FMF headpipe.

The Powercore 4 spark arrestor muffler. FMF developed the Powercore 4 to increase the horsepower and torque throughout the entire power curve. Highest quality packing for long life. Removable spark arrestor included. Louder than the Q4. Approximately 99db stock or about 94db with optional Quiet Insert installed.

• Uses long-life muffler packing for increased packing life
• Forest Service approved spark arrester

Delayed stock from manufacturer, please ask for availability.

• 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 caps make for the perfect balance of performance and strength
• Removable spark arrestor included

• Constructed of stainless steel with a lightweight allow can
• Space age internal packing for maximum packing life
• Hi-Flo modular end cap
• Internal shape of core uses Hi-Flo technology
• Enhanced sonic evacuation provides for higher flow and increased power
• Includes removable spark arrestor

No repacking required! The Leo Vince X3 Enduro is made with TIG welded stainless steel internals and aluminum outer shell. It features a semi-direct chamber design that is maintenance free. It's quiet too! Our own in-house testing showed a 84dB sound level using the USFS J1287 testing procedure. 84dB is louder than stock but significantly quieter than any other aftermarket muffler. It includes a certified Spark-Arrestor.

This muffler works on OEM header only!

The new DG RST (Reduced Sound Technology) muffler is the quietest DG muffler and is designed especially for dual-sport machines (Just 84db @ 3200 RPM). 

A new baffle design dissipates sound waves reducing noise output in a very efficient manner. This new design also stretches out the time between muffler repacks. 

Included is a Stainless Steel mid-pipe, USFS Approved Spark Arrestor and a new Aluminum end cap. The installed weight is approximately 7.7 lbs.

The DG RST (Reduced Sound Technology) muffler is the quietest DG muffler and is designed especially for dual-sport machines (Just 89db @ 3200 RPM). A new baffle design dissipates sound waves reducing noise output in a very efficient manner. This new design also stretches out the time between muffler repacks. Included is a Stainless Steel mid-pipe, USFS Approved Spark Arrestor and a new Aluminum end cap.

You may want to consider a new exhaust gasket that goes between the header and the muffler.

Yoshimura RS-3 that will slip right on to your stock header. Made by hand to the highest quality standards using the championship-winning racetrack experience and their extensive R&D facility ensure these pipes perform and will last.

Both full systems and slip-on mufflers include 96 dB sound insert/USFS approved spark arrestor installed in the muffler. Mid-pipe is stainless steel while the stainless RS-3 oval muffler design has a slim profile with an aluminum end cap.

Works on OEM header only!

Since Kawasaki brought back the popular little KLX250 with updated fuel injection, Yoshimura brought back an updated RS-2 slip-on that now incorporates an o2 sensor that accommodates the new fuel injection technology on the KLX. All of that with added power, torque and that distinct Yoshimura exhaust note.

Entire unit is proudly made in the good old US of A to boot!

• Diamond-shaped sleeve
• Large core and increased muffler packing volume means quieter operation
• Stainless steel cone end-cap
• Stainless steel tail-pipe
• 2.8 lbs. lighter over stock unit.
• Comes with USFS Approved Spark Arrestor

The product that you are purchasing is designed and intended for closed course competition use only and is labeled as such, i.e. Yoshimura "RACE SERIES." Yoshimura RACE SERIES products are neither designed nor intended for use on PUBLIC ROADS or LAND. Such use is prohibited by Federal and State regulations.

The V2 Slip-On features new aluminum end caps. A USFS Spark Arrestor. DG offers 4 different Quiet Core Inserts to reduce exhaust sound. Lightweight at approximately 5.5 lb.s

No repacking required. The LeoVince X3 Enduro is made with TIG welded stainless steel internals and aluminum outer shell. It features a semi-direct chamber design that is maintenance free. It's quiet too! Our own in-house testing showed a 84dB sound level using the USFS J1287 testing procedure. That is a bit louder than stock but significantly quieter than other aftermarket mufflers. It includes a certified Spark-Arrester. This muffler requires a stock muffler joint gasket when used with either the stock headpipe or the FMF headpipe.

The EVO R series draws on our 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 noticeable performance gains and sound tremendously better than stock.

• Hard anodized oval shaped aluminum muffler
• TIG welded reinforced muffler bracket(s)
• 304 stainless steel mid pipe
• Red powder coated stainless steel end tip
• Lighter than stock exhaust system
• Huge horsepower and torque gains
• Sleek muffler design allows for maximum clearance
• Removable screen-type spark arrestor included
• Handmade in the USA
• 1 Year Limited Manufacturer’s Warranty

• Powercore silencers give your ride a deep works-like tone while providing optimum, dyno-tuned performance
• Silencer body is constructed of 6061-T6 grade aluminum with machined mounts and a clear anodized finish to bring out the shine

X3 EVO represents the off-road evolution: LeoVince has combined all its experience in the off-road world with cutting-edge materials and Italian design, enhancing freedom in its purest form.

The X3 EVO body is made of AISI 304 stainless steel with TIG welds handcrafted by specialized operators, to guarantee long-lasting performance. X3 EVO will allow you to face the most extreme environments and conditions because it does not fear water or mud, nor wear over time.

The LV logo is their tribute to a motorcycle culture that we have loved for 70 years and is laser etched on the body of the exhaust: it is as endless as their passion.

They manufacture the end cap in 100% real carbon, with their special 2x2 twill carbon fiber, specifically designed to resist high temperatures and make the X3 EVO even lighter.

The matte clear coating, in addition to enhancing the carbon texture, protects the end cap from wear and UV rays, keeping the X3 EVO always in a perfect shape.

The sound of X3 EVO is already unmistakable at low revs. X3 EVO has a direct interior, specially conceived to channel the exhaust gas in an optimal way, to unleash a deep sound, giving a new voice to your bike.

The X3 EVO's Spark arrester has been tested and approved by the United States Forest Service and is essential for off-road riding in compliance with regulations, with more peace of mind, more respect for the environment and more fun.

The Powercore 4 spark arrestor muffler. FMF developed the Powercore 4 to increase the horsepower and torque throughout the entire power curve. Highest quality packing for long life. Removable spark arrestor included. Louder than the Q4. Approximately 99db stock or about 94db with optional Quiet Insert installed.

• Uses long-life muffler packing for increased packing life
• Forest Service approved spark arrester

X3 EVO represents the off-road evolution: LeoVince has combined all its experience in the off-road world with cutting-edge materials and Italian design, enhancing freedom in its purest form.

The X3 EVO body is made of AISI 304 stainless steel with TIG welds handcrafted by specialized operators, to guarantee long-lasting performance. X3 EVO will allow you to face the most extreme environments and conditions because it does not fear water or mud, nor wear over time.

The LV logo is their tribute to a motorcycle culture that we have loved for 70 years and is laser etched on the body of the exhaust: it is as endless as their passion.

They manufacture the end cap in 100% real carbon, with their special 2x2 twill carbon fiber, specifically designed to resist high temperatures and make the X3 EVO even lighter.

The matte clear coating, in addition to enhancing the carbon texture, protects the end cap from wear and UV rays, keeping the X3 EVO always in a perfect shape.

The sound of X3 EVO is already unmistakable at low revs. X3 EVO has a direct interior, specially conceived to channel the exhaust gas in an optimal way, to unleash a deep sound, giving a new voice to your bike.

The X3 EVO's Spark arrester has been tested and approved by the United States Forest Service and is essential for off-road riding in compliance with regulations, with more peace of mind, more respect for the environment and more fun.

• The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available
• Constructed from aircraft grade aluminum and high strength stainless steel
• Sound output 96dB
• 8 pounds lighter than the stock muffler

The EVO R series draws on our 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 noticeable performance gains and sound tremendously better than stock.

• Hard anodized oval shaped aluminum muffler
• TIG welded reinforced muffler bracket(s)
• 304 stainless steel mid pipe
• Red powder coated stainless steel end tip
• Lighter than stock exhaust system
• Huge horsepower and torque gains
• Sleek muffler design allows for maximum clearance
• Removable screen-type spark arrestor included
• Handmade in the USA
• 1 Year Limited Manufacturer’s Warranty

• Available in 52mm or 58mm lengths
• Kit contains two stainless steel exhaust swivel springs
• Free-floating mounting hooks to avoid breakage

• The latest EVOLUTION of the popular LV ONE: aggressive sound and style
• Clean laser-etched Leo Vince logo in an innovative carved design (for the carbon fiber exhaust: bright aluminum die-cut high-temp resistant Leo Vince adhesive logo)
• Asymmetric design and high-tempiresistant full-carbon fiber end cap
• Impact-resistant sandblasted oval AISI 304 stainless steel sleeve – titanium look
• TIG-welded stainless steel front cup
• Adjustable full-carbon fastening strap
• Removable dB killer, weight savings and flawless installation

DG Performance exhausts help your engine breathe better, resulting in increased throttle response, power and torque.

The V2 Series Slip-On muffler features:

• Lightweight aluminum body
• Stainless steel inlet tube
• TIG welded components
• Great new look

Standard sound level is approximately 98 db and quiet core inserts are available separately.

This Lightweight Slip-On weighs approximately 5.5 lbs and bolts directly to the stock headpipe.

It is equipped with a US Forest Service-approved spark arrestor.

• Reduce exhaust sound by one to six decibels
• Options for DG V2 & RST and for the older "O" & "R" Series mufflers
• Easy installation; remove rear end cap and place Quiet Core in front of the spark arrestor
• Smaller diameter inserts are quieter but more restrictive; larger inserts are less restrictive but louder
• 1" Not recommended for RST
• Each size is sold separately

The new DG RST (Reduced Sound Technology) muffler is the quietest DG muffler and is designed especially for dual-sport machines (Just 89db @ 3200 RPM). A new baffle design dissipates sound waves reducing noise output in a very efficient manner. This new design also stretches out the time between muffler repacks. Included is a Stainless Steel mid-pipe, USFS Approved Spark Arrestor and a new Aluminum end cap.

You may want to consider a new exhaust gasket that goes between the header and the muffler.

The DG RST (Reduced Sound Technology) muffler is the quietest DG muffler and is designed especially for dual-sport machines (Just 84db @ 3200 RPM). A new baffle design dissipates sound waves reducing noise output in a very efficient manner. This new design also stretches out the time between muffler repacks. Included is a Stainless Steel mid-pipe, USFS Approved Spark Arrestor and a new Aluminum end cap.

The latest in muffler packing technology. Spec 31 high performance muffler packing resists breakdown up to 1400°F, is universal, and is easy to install.

• Kits come in 2 lengths - 15" and 19"
• Pillows can be trimmed to length to fit different mufflers.
• Includes a cap stuffer to fill packable end caps.

Re-pack your silencer with this pro-quality, three layer packing system and restore lost power and sound control.

Kit includes:

• 60"x20"x1⁄4" glass mat.
• 7"x20" stainless wool
• 8"x20" stainless mesh
• Twelve 3⁄16" rivets

Their baffle was designed to replace the stock insert. The baffle produces a nice note compared to the de-restricted stock version and dyno test results showed an increase on 2 hp up top.

A noise test on the insert was conducted at the EPA Victoria Vehicle Test Station at Macleod under controlled conditions with Class 1 meters.

Some extra details:

1. The ADR test is conducted at an engine speed which is 50% of the engine rpm at which the engine develops maximum power. However, this engine speed is determined when the bike is in restricted form, with a throttle restrictor that stops the throttle being fully opened. This is why the ADR engine test speeds are so low. However, they are the engine speeds used to determine compliance.
2. On the ADR test, the B&B tip was over the signature noise emission, but a tolerance of 5 dB(A) is allowed before prosecution would be initiated. With this tolerance, the insert would not be prosecuted as it is just 4 dB(A) over the signature.
3. When tested with the standard OEM tips (as fitted when delivered from Suzuki Australia), the Suzuki came in at 95 dB(A) for the ADR test

Does not contain a spark arrestor. Check local laws on spark arrestors before purchase.

This Quiet Insert comes stock in all new FMF Q4 mufflers. If you lost yours, this is the replacement you need.

It will fit Q4, Q4 Hex, Powercore and Powercore Hex mufflers.

It will reduce the sound rating of the Power Core models, from about 99db down to about 96db.

Please choose the correct Insert for your muffler. If you are unsure of the year that your muffler was manufactured you can easily identify visually which insert you will need.

The ProCycle SS1 muffler was designed so this existing spark arrester will fit right in. This is also the same unit that is often adapted to the GSXR 40F0 muffler. It fits FMF exhaust as well.

• RS-3 Sound Insert for the Honda Monkey
• This new insert is designed to take the dB level down and fit perfectly with the RS-3 for the Monkey

• Updated version with weldnut inside of insert makes installation/removal easier
• Replacement USFS Approved Spark Arrester for RS-4 Mufflers with "Turn-out" end-cap.
• Available as optional Spark Arrester on applications not originally equipped with a Spark Arrester
• Kit Includes:
  • Spark Arrester Insert
  • End-cap collar
  • Set screw

Helix brand exhaust springs made from zinc plated music wire. These are the springs we use on our GSXR Mid-Pipe Kit. If you lose one, or break one, these are the direct replacements. Sold as a Pair.

Precision cut from heavy gauge material.

Extremely durable design.

Push/Pull design for hard to reach places.

Soft but durable PVC coated handle.

The 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 with a flow increase of nearly 10%!

Limited Quantity Available

The 12oclock Labs EXUP Emulator is used in place of the stock exhaust servo motor when you replace the stock exhaust with an aftermarket exhaust system. The microprocessor controlled EXUP, emulates the exact characteristics of the stock exhaust servo motor and its motor delay sweeps, keeping the ECU from displaying the dreaded check engine light. Weight is less than 1/2 an ounce and it is a direct plug and play replacement.