Skip to content

Exhaust
Vision
Apparel
- Shop All
  New Arrivals
  
  Mens
  
  Short Sleeve Tees
  
  Long Sleeve Tees
  
  Hoodies
  
  Socks
  
  Hats
  
  Accessories
- ETHIKA x FMF
  
  Classics
  
  2-Stroke
  
  Kurt Caselli
  
  50% Off Sale
The Drop
About
Log in

Instagram
Facebook
YouTube
Twitter

Exhaust

Bike

Shop All Exhaust

2-Stroke Pipes

2-Stroke Silencers

4-Stroke Mufflers

4-Stroke Headers

Universal Exhaust
ATV

ATV 2-Stroke Pipes

ATV 2-Stroke Silencers

ATV 4-Stroke Headers

ATV 4-Stroke Mufflers
Exh. Replacement Parts

Shop All

Exhaust Decals

Packing

Springs & O-Rings

End Caps

Sleeves

Flanges
Exhaust Accessories

Shop All

Spark Arrestor/Quiet Inserts

Heat Shields

Strap Mounts

Wash Plugs
FMF Accessories

Shop All

Accessories

Stickers

Bike Graphics

Banners & Covers
Vision
Apparel

Shop All

New Arrivals

Mens

Short Sleeve Tees

Long Sleeve Tees

Hoodies

Socks

Hats

Accessories
Collections

ETHIKA x FMF

Classics

2-Stroke

Kurt Caselli

50% Off Sale
The Drop
Team
About

Log in Search Cart

CHOOSE YOUR BIKE

Loading Bike Finder...

Home/ 4-Stroke Mufflers

4-Stroke Mufflers

ELITE PERFORMANCE

FACTORY 4.1

PROVEN BY 2022 CHAMPION ELI TOMAC, THE FACTORY 4.1 DELIVERS THE BEST IN POWER AND HANDLING

ACCESS POWER

POWERCORE 4

INCREDIBLE PERFORMANCE AND VALUE FOR TRACK AND TRAIL

LESS SOUND, MORE GROUND

Q4

QUIET POWER FOR THE GREAT OUTDOORS

Shop

Exhaust
Vision
Apparel

About

About FMF
Careers
Transparency In Coverage

Customer Support

Customer Service FAQ
Contact FMF
Terms & Conditions
FMF Privacy Policy

Rider Support

Parts FAQ
Muffler Repacking
Product Manuals
Associate Sponsors

Be the first to know

Sign up to receive the latest news and deals from FMF Racing.

Enter your email

Instagram
Facebook
YouTube
Twitter