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When designing the PowerCore 4 HEX, they looked at their 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.

Features:

• 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.
• Can be used with FMF or Stock OEM Header

Stainless steel can and carbon fiber end cap.

• Trapezoid-shape muffler
• Maximized internal volume
• Straight, single core baffle
• Low-volume sound insert capable

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

Body is made from lightweight 6061 T-6 brushed aluminum and the end cap and intake tube are stainless steel. Silencers include wire-meshed spark arrester that can be removed for closed-course racing. Optional end caps allow fine-tuning of power delivery for different types of riding and terrain.

• Computer-designed and dyno-tested for every 4-stroke application
• Hi-Flo end cap boosts all-around performance
• Optional Quiet Core insert will provide a decrease in sound level if desired
• Enhanced sonic evacuation delivers a higher flow of exhaust gases, which increases power
• Feature a screen-type spark arrestor that does not interrupt exhaust flow or performance
• FMF's exclusive cross-weave internal packing provides longevity and maximum sound dispersion
• Round perforated steel inner cores make for optimum flow, using hi-flo technology
• Elliptical aluminum can offers strategic sizing for superior performance
• A stainless steel mid-pipe mates to the computer-designed rear can for lightweight durability

Ultra-Light, Race Inspired Titanium Muffler

Available in slip-on/bolt-on and full system configurations depending on the application

• Titanium body
• Spring retained inlet
• 2.25" Spiral perforated core
• Billet CNC machined aluminum outlet
• Carbon fiber end cap
• Tunable for tone with P1 and P1-X insert options
• Stainless steel headers/mid-pipes where applicable
• Made in the USA

• 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

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

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

Muffler has superficial marks on the inside, not visible when mounted. Never been installed or used, scratches happened in shipping. Sold as is.

When designing the PowerCore 4 HEX, they looked at their 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.

Features:

• 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.
• Can be used with FMF or Stock OEM Header

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.

• 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

• Select applications available in SX version that is designed for more low to mid-range power and an MX version that is focused in the mid-to-upper rpm range
• Act as "pre-muffler" helping to lower the decibel output
• Available in stainless steel for strength combined with light weight, or in titanium for even greater weight savings
• Utilize FMF's patented module precisely located at the initial stage of the header for specific applications
• Horsepower is increased as much as 10%
• The expansion and contraction of exhaust sonics through the system causes increased flow
• Position "Bomb" increases performance

The race-bred RS-2 exhaust has proven to be extremely popular among rider looks for a combination of performance and value. It enhances performance dramatically, provides an enviable exhaust note and offers the unmistakable look and sound of Yoshimura. RS-2 mufflers feature a straight baffle that leads to a single turn-down machined aluminum end cap.

All models have a USFS Approved spark arrester in a oval-shaped sleeve with a large volume of packing material.

The RS-4 Slip-On exhaust has a unique design that provides an unrivaled combination of power and a quiet exhaust note.

• Pentagonal-shaped sleeve
• Front muffler cap functions as a polyresonant chamber which helps reduce noise
• Laser-cut heat shield on polyresonant chamber
• Two-stage stepped baffle
• Turn-out carbon fiber end-cap
• Stainless steel tail-pipe

• 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

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!

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

The FMF Powerbomb and Q4 Muffler are legendary in the exhaust market.

The Powerbomb header promotes better flow by allowing a small expansion of the exhaust gasses improving scavenging. The 'bomb' also acts as a pre-muffler taking the edge off of overall sound levels.

The Q4 muffler employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available with a sound output of 96dB; with most models below 93 dB. It is constructed from aircraft grade aluminum and high strength stainless steel.

The RS-2 is a potent and versatile design that evolved from their original TRC, engineered to provide increased 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 sleeve
• Large core and increased muffler packing volume means quieter operation
• Stainless steel cone end-cap
• Stainless steel tail-pipe
• USFS Approved spark arrester included
• 6.8 lbs lighter than stock

We recommend Anti-Seize on exhaust fasteners

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

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

The T-6 exhaust system contains a stainless steel head pipe, brushed aluminum canister and a carbon fiber end-cap for added durability and a professional look. This exhaust system features the same benefits as the T-6 Stainless Steel Exhaust System, but is designed to fit Yamaha's TT-R125 model. In addition to all of these features, the T-6 will come with a removable United States Forest Service approved spark arrestor for trail/off-road riding.

Features Include:

• Improves performance
• Stainless steel construction throughout head pipe
• Brushed aluminum canister
• Carbon fiber end-cap
• Strong mounting bracket for increased strength and durability
• Asymmetrical muffler configuration for increased packing volume
• Removable U.S.F.S. approved spark arrestor
• Two piece system including head pipe and canister
• TIG precision welding

• 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.
• Can be used with FMF or Stock OEM Header

 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

Includes the Enduro Series RS-2 muffler and stainless steel header. This potent and versatile design is engineered to provide increased power and power delivery. The RS-2 has a pyramidal shape that features increased volume, and is a quieter system with a larger core — and it offers the added bonus of outstanding performance in a value-priced package.

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 PowerBomb header promotes better flow by allowing a small expansion of the exhaust gasses. The 'bomb' also acts as a pre-muffler taking the edge off of overall sound levels.

Optional Heat Shield Strip will protect your airbox from the close proximity of the hot head pipe.

The T-6 Stainless Steel Exhaust System offers the same benefits as our popular Ti-6 Titanium Exhaust System, but the T-6 is constructed of stainless steel and aluminum for increased strength and durability while giving riders a more affordable alternative to titanium. The T-6 comes with a removable United States Forest Service (USFS) Approved Spark Arrestor making it easy to alternate between off-road and closed course riding.

Features:

• Improved performance
• Titanium canister
• Stainless steel header
• Carbon fiber end-cap

Yoshimura has paired their legendary RS-2 exhaust pipe with the Kawasaki KLR 650. The KLR 650 has literally been ridden around the world, and now with our fire-breathing RS-2 slip-on exhaust system, you can do it faster - and in style!

Assembly comes complete with:

• Stainless muffler sleeve
• Stainless steel mid-pipe
• All installation hardware
• Detailed instructions
• Trick, turn-down tip inserted in the endcap
• Dual stainless steel mounting brackets
• High-quality chrome steel exhaust springs with spring vibration dampers with the Yoshimura logo molded in
• Plastic end cap to plug the pipe during washing
• Super-trick spring pulling tool

• 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 RS-2 is a potent and versatile design that evolved from our 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

• 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

Pre-Order

• 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

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

Straight-through design of the spark arrestor canister and the Performance Flow stainless steel end cap ensure strength, durability and unrestricted power.

• 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

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 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

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.

Another great combination package - the FMF Powerbomb header and Powercore 4 Muffler.

The Powerbomb header promotes better flow by allowing a small expansion of the exhaust gasses improving scavenging. The 'bomb' also acts as a pre-muffler taking the edge off of overall sound levels.

The PowerCore4 muffler was developed to increase the horsepower and torque throughout the entire power curve and give you a noticeable power increase that is very usable and beneficial, no matter what your riding style or ability is.

Some of the features of the PowerCore 4 include: 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 and removable spark arrestor.

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

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 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.