Big Gun EVO R Complete Exhaust Systems Yamaha Raptor 700 The EVO R series from Big Gun stands out, delivering significant performance enhancements, weight efficiency, and a commanding upgrade over the stock sound. 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.