The sweet, sweet sound of a 2-stroke engine. It is a favorite among Motocross enthusiasts and we've seen our share of scuffles break out over the subject of 2-strokes vs. 4-strokes - but we're not here to take sides!

If you're looking to upgrade or replace the exhaust system on your 2-stroke you've come to the right place. Our goal is to protect you from all the mental roost thrown your way so you can make an informed decision on the best 2-stroke exhaust system for your ride.

It's pretty easy to identify a 2-stroke exhaust design from a 4-stroke exhaust design. The 2-stroke exhaust system uses an expansion chamber - the prominent bulge in the exhaust pipe - to increase the engine's horsepower. In short, the expansion chamber creates a pump, by using the momentum and pressure of the exhaust gases, and squeezes more air and fuel into the cylinder during the intake stroke.

If you're new to riding or looking to replace or upgrade existing 2-stroke exhaust pipes then this guide is your first stop. Here is how to pick the best 2-stroke exhaust system for your bike.

Complete 2-Stroke Exhaust Pipes

What is your style of riding?



Off-Road/Trail Riding

Supercross and Arenacross use tightly-wound man-made courses inside an arena or stadium setting. These tracks allow very little, if any, full-throttle straightaways and rely almost entirely on tight corners and lots of jumps and whoops.

Motocross events take place on closed course dirt race tracks featuring jumps and other man-made dexterity testing obstacles. Motocross tracks characteristically do not include elements like large rocks, tree roots, water crossings and other off-road and trail riding obstacles.

Off-road trail riding varies from tight single track trails in the mountains, down to high speed wide open desert riding and everything in between. This will be the most diverse riding displaying many terrain types and naturally occurring obstacles.

Most Common 2-stroke Exhaust Systems to Consider

Most Common 2-stroke Exhaust Systems to Consider

Most Common 2-stroke Exhaust Systems to Consider

FMF Fatty

Pro Circuit Platinum Pipe

FMF Gnarly


  • More low and midrange RPM
  • Smoother power curve
  • Improved throttle control


  • Increased horsepower and torque
  • Ideal for racing


  • Thick 18 gauge construction for off-road protection
  • Nickel plated

If you're all of the above as far as riding styles and you'd simply prefer a bike with more torque or you'd like to open the throttle in any terrain then select your exhaust based on the performance characteristics you want from your bike.

What performance range are you looking for?

Low to Midrange RPM

Higher-range RPM

Pro Circuit Platinum 2

FMF Fatty Pipe 2-stroke


  • Substantial low and midrange power
  • Carbon steel construction
  • Nickel plated


  • Provides power gains throughout entire power band
  • More tractable power, improved throttle control
  • Carbon steel with a nickel-plated finish

2-Stroke Silencers

If you're on a budget and looking for peak 2-stroke exhaust performance minus the expense of a complete system a silencer is your best bet. Keep in mind when replacing your exhaust system, an aftermarket silencer is compatible with stock pipes and aftermarket pipes are generally compatible with a stock silencer.

Most Common 2-stroke Silencers to Consider



Off-road/Trail Riding

FMF Powercore 2 Shorty

Pro Circuit Factory Sound R304 Shorty

FMF Powercore 2


  • Maximizes bottom and midrange performance
  • Ideal for tight Supercross style tracks


  • Increased horsepower and torque
  • Ideal for closed-course racing


  • Long length gives mid to top end performance
  • Tuned perforated core

If you're looking simply for performance based on your method of riding rather than racing style consider these silencers:

Low-end to mid-range RPM

Higher-end RPM

FMF Powercore 2 Shorty Silencer

Pro Circuit Factory 304


  • Ideal for tight tracks and Supercross
  • shortened inner core length and canister
  • Easy maintenance


  • Lighter than stock
  • Improves top-end power

2-Stroke Spark Arrestors

If you live in an area of the country that requires the use of a United States Forest Service approved spark arrestor consider this silencer without sacrificing performance:

Spark Arrestor

Pro Circuit Spark Arrestor



  • Eliminates sparks
  • Meets USFS noise standards
  • Clog-free Krizzman bullet design