FTC: Contains affiliate links. We may earn a commission at no cost to you. Full disclosure →
Gear Review · Exhaust
All 9 exhaust systems we've tested and ranked, from quiet trail-legal options to full titanium race systems, sorted by rating.
Complete header-to-muffler systems for maximum performance gains, the biggest investment, the biggest gains.
Exhaust
FMF's Factory 4.1 RCT is the industry's most popular full exhaust system, built from aerospace-grade titanium at FMF's Southern California factory. Resonance Chamber Technology lowers decibels without sacrificing the power gains the 4.1 is known for.
Exhaust
Built for professional AMA Supercross and Motocross racers, the Ti-6 Pro uses titanium in the head pipe, mid pipe, and canister to shed weight while passing AMA/FIM sound regulations, no USFS spark arrestor included, since it's a dedicated race system.
Exhaust
Developed directly with American Honda HRC engineers, the RS-9T moves its dual mufflers forward and under the number plates for better mass centralization, with a 3-stage header tuned for broader, more usable power delivery.
Exhaust
An evolution of Yoshimura's original TRC design, the RS-2 uses a diamond-shaped muffler with increased internal volume for a quieter, more powerful system, a genuinely popular off-road exhaust at a more accessible price than the flagship RS-9T.
Bolt-on mufflers that pair with your stock header for an easier install and lower cost than a full system.
Exhaust
FMF's Powercore 4 delivers race-inspired performance at an economical price, a durable aluminum-and-stainless slip-on with a Hi-Flo core shape and included USFS-approved spark arrestor, built for riders who want a bolt-on power gain without full-system money.
Exhaust
The Q4 Hex trades a bit of the Powercore 4's aggressive tone for a genuinely quieter ride, a smart pick for riders at tracks with strict sound restrictions who still want more flow than a stock muffler.
Expansion chambers tuned for different parts of the powerband, from low-end torque to broad, linear power.
Exhaust
One of the most-imitated expansion chambers ever made, the Gnarly is built to add 4-stroke-like tractor torque to a 2-stroke, strong, rugged 18-gauge steel construction aimed squarely at getting you out of the toughest terrain, not top-end speed.
Exhaust
FMF calls the Fatty their most popular pipe, and for good reason, it broadens and smooths the entire power curve rather than chasing one part of the rev range, making it the safe, versatile all-rounder of FMF's 2-stroke lineup.
Exhaust
Pro Circuit's Works Pipe traces directly back to founder Mitch Payton's original hand-tuned 2-stroke pipes, the product that built the company. Still a go-to choice for racers who want a proven, race-bred power curve.