Big Gun

Founded in 1997 by three-time AMA National Four-Stroke Champion Mike Young Jr., Big Gun Exhaust has established itself as one of the premier manufacturers of high-performance exhaust systems for ATVs, UTVs, side-by-sides, motocross bikes, and street motorcycles. Young leveraged his championship racing experience to create exhaust systems that deliver proven track performance for four-stroke machines. After changing ownership in 2010, the company underwent comprehensive restructuring, consolidating all research, development, manufacturing, and distribution operations under one roof in Corona, California, leading to unprecedented growth and product innovation.

Big Gun Exhaust Product Lines

Big Gun specializes in four-stroke exhaust technology with several distinct series designed for different riding styles and applications:

  • EVO R (Racing) Series: Designed for maximum power and weight savings, the EVO R is built for competition use on sport ATVs and motocross bikes. Features anodized aluminum mufflers mated to 304 stainless steel header pipes, delivering massive horsepower and torque increases. The reduced-size muffler provides full clearance while maintaining aggressive sound output. Includes removable USFS-approved spark arrestor screens.
  • EVO U (Utility) Series: Purpose-built for utility ATVs, sport-utility quads, and side-by-sides, the EVO U series combines raw power with a deep, throaty exhaust tone. Constructed from .049" thick 304 stainless steel tubing with high-temp black thermal coated oval aluminum mufflers. Features Vortex Quiet Insert technology to manage sound levels while maintaining performance. Includes TIG-welded reinforced muffler brackets and USFS-approved spark arrestors.
  • EVO M (Mini) Series: Specifically engineered for 50cc to 110cc youth ATVs, providing the same performance benefits, weight reduction, and aggressive sound that full-size machines receive. Aluminum mufflers with 304 stainless steel pipes and TIG-welded hangers.
  • ECO Series: Budget-friendly slip-on exhaust systems offering improved power and torque over stock configurations. Features 6061 aluminum mufflers mated to 304 stainless steel pipes with black powder-coated stainless steel end caps. Available for select recreational, sport, and utility machines with removable USFS-approved spark arrestor screens.
  • EXO Series: Premium exhaust line designed for larger displacement machines requiring bigger mufflers to optimize power output. Hexagonal-shaped aluminum mufflers incorporate internal sound wave altering technology that maximizes performance while managing sound levels. Available in standard aluminum or EXO Stainless configuration with all 304 stainless steel components for maximum durability.

Performance Gains & Technical Specifications

Big Gun exhaust systems typically deliver 3-5 horsepower increases and 4-6 foot-pounds of additional torque compared to stock exhaust systems. All systems are significantly lighter than OEM configurations, utilizing lightweight brushed aluminum mufflers, 304 stainless steel tubing, and precision TIG welds. The Vortex Quiet Insert technology can reduce noise levels by up to 6 dB when desired while maintaining performance characteristics.

Tuning & Installation Requirements

Big Gun strongly recommends proper tuning when installing any aftermarket exhaust system. For carbureted machines, re-jetting is required. For fuel-injected applications, Big Gun offers the TFI Power Box, a plug-and-play fuel controller that optimizes fuel delivery and exhaust timing for maximum horsepower gains. Installation is typically a straightforward bolt-on process requiring one hour or less for most applications.

Popular Big Gun Applications

  • Honda TRX 400EX, 450R, and 700XX sport ATVs
  • Yamaha Raptor 250R, 350, 660, and 700R models
  • Kawasaki KFX 400, 450R, and Brute Force utility models
  • Polaris Sportsman, RZR 170, and various UTV models
  • Can-Am Outlander and Renegade series
  • Suzuki LTR 450 and Z400 sport quads
  • Youth models including Honda TRX 90, Polaris Outlaw 50/110, and Yamaha Raptor 90

Manufacturing Excellence

All Big Gun Exhaust products are manufactured in the USA using cutting-edge equipment and advanced design techniques. The company maintains one of the fastest lead times in the powersports industry and partners directly with successful race teams to gather real-world performance data for continuous product improvement.