Big Gun EVO R Slip-On Exhaust Yamaha Yfz450 The EVO R series from Big Gun is designed to cater to high performance demands. Offering significant improvements in performance and weight reduction over standard items, it boasts a sleek design that can be easily bolted on. The model also features an enhanced sound compared to stock models, making it a powerful addition for those seeking an upgrade. Features: Hard anodized oval shaped aluminum muffler TIG welded reinforced muffler bracket(s) 304 stainless steel mid pipe Red powder coated stainless steel end tip Lighter than stock exhaust system 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.