Championship-Proven 4-Stroke Performance – Made in USA
Big Gun Exhaust was founded in 1997 by Mike Young Jr., 3-time 4-Stroke AMA National Champion. Young knew what it took to win races and used that knowledge to manufacture high-performance exhaust systems that deliver on the track and trail. What started as a passion project evolved into one of the largest 4-stroke exhaust product lines available, covering MX, sport ATV, utility ATV, Side-by-Side, street, and scooter markets.
Today, Big Gun operates from a dedicated facility in Corona, California where all research, development, manufacturing, and testing happens under one roof. The company partners with successful race teams and riders, gathering valuable data that drives continuous product improvement. With an emphasis on customer service, quality manufacturing, and industry-leading lead times, Big Gun has built a tremendous customer base worldwide.
EXO Series – Maximum Performance
The EXO Series represents Big Gun's premium exhaust line, engineered for maximum airflow and power. EXO Stainless takes durability to the extreme with full 304 stainless steel construction from front to back—header pipe, mid-pipe, and muffler—built to withstand the most brutal riding conditions. TIG-welded stainless steel base plates and stamped stainless badges complete the premium package. Available in full systems, slip-ons, and dual exhaust configurations for sport ATVs and UTVs.
EVO Series – Race-Proven Power
The EVO Racing Series delivers massive horsepower and torque gains throughout the RPM range. Built with 27 years of Mike Young's racing experience, the EVO R provides tractable power that wins races—not just peak numbers on a dyno. Hand TIG-welded 304 stainless steel mid-pipes mate to hard-anodized 6061 aluminum oval mufflers with titanium finish. Sleek silencer design provides maximum clearance to avoid contact with brake calipers. Every EVO R includes CNC-machined brackets, Race Tools packing, and spark arrestor screen.
EVO U (Utility) targets hard-working machines and sport-utility vehicles with reliable power gains and improved exhaust tone. High-grade aluminum mufflers with high-temperature black finish pair with 304 stainless steel pipes and TIG-welded reinforced brackets.
EVO M (Mini) brings Big Gun performance to 50cc-110cc youth ATVs and pit bikes. Let the kids rip on a machine that sounds as mean as the full-size versions.
EVO S covers scooters and small-displacement street machines with the same quality construction.
ECO Series – Performance Value
The ECO Series delivers Big Gun performance, power, sound, and craftsmanship without hurting your wallet. Made from 0.049" stainless steel tubing and 6061 brushed aluminum muffler canisters, ECO slip-ons provide economically-priced upgrades for popular dirt bike and ATV models. Quiet 98dB operation (with Vortex Quiet Insert) keeps you track and trail legal. USFS-approved spark arrestor screens, slip-fit mid-pipe design, and stainless band strap mounts deliver quality you can count on.
TFI Power Box & Rev Box Tuners
Get the most from your Big Gun exhaust with proper fuel tuning. The TFI Power Box is a plug-and-play fuel controller that optimizes EFI delivery to work with your new exhaust system. Program your motorcycle, ATV, or Side-by-Side in minutes and unlock additional horsepower with improved throttle response. The Rev Box provides an affordable alternative to expensive OEM replacement units, increasing RPM limits and advancing timing curves for more aggressive power delivery.
Exhaust Service & Support
Big Gun stands behind their products with industry-leading support. If your exhaust wears out or gets damaged, Big Gun offers a refurbishing service starting at just $60 plus parts—send in your old system and get it back good as new. Packing kits, Vortex quiet inserts, spark arrestor parts, and replacement hardware keep your system performing for years.
Construction Quality
Every Big Gun exhaust features hand TIG-welded 304 stainless steel construction, 6061 aircraft-grade aluminum muffler housings, and USFS-approved removable spark arrestor screens. Slip-fit mid-pipe designs allow subframe movement and prevent system breakage. Quality made in the USA with a one-year manufacturer's warranty.
Vehicle Coverage
We stock Big Gun exhaust systems for Honda, Yamaha, Kawasaki, Suzuki, Polaris, Can-Am, Arctic Cat, and more. From CRF and YZ dirt bikes to Raptor and YFZ sport quads, Grizzly and Sportsman utility ATVs, RZR and Talon Side-by-Sides—Big Gun has systems engineered for your machine. Typical installations deliver 3-5 horsepower and 4-6 ft-lbs of torque gains.
Shop the complete Big Gun Exhaust collection at Dune Goons. Fast shipping from Oregon.
