Big Gun EVO R Complete Exhaust Systems Honda TRX 450R The EVO R series from Big Gun stands out with its performance enhancements, lightness compared to the original, and enhanced sound. This product offers an aftermarket performance that won't disappoint, encapsulated in a sleek design that can be easily attached. Features: Hard anodized oval shaped aluminum muffler TIG welded reinforced muffler bracket(s) 304 stainless steel mid pipe / head pipe Red powder coated stainless steel end tip Lighter than stock exhaust system Huge horsepower and torque gains Sleek muffler design allows for maximum clearance Removable screen-type spark arrestor included Handmade in the USA Note: Manufacturer recommends tuning exhaust after installation for optimal performance.