Yamaha Wolverine/ R-SPEC/ EPS/ EVO U Series Slip On/ 2016 The Big Gun EVO Utility Series was designed to deliver raw horsepower and torque gains for utility ATVs and UTVs. All Utility slip-on and full systems are made from .049 stainless steel tubing an an aluminum muffler canister, the Big Gun Utility exhaust system is much lighter than a stock unit. Our sleek muffler design allows for maximum clearance to avoid collisions with the rear brake caliper. 96-98 db track and trail legal with included Vortex quiet insert. USFS forestry approved spark arrestor included