Big Gun EVO R Slip On Exhaust Fits: Yamaha Raptor 660 (All Years) The EVO R series draws on our rich heritage of making power. Offered for various off road MX and sport ATV models, the EVO R is a tried-and-true series that will save weight, add noticeable performance gains and sound tremendously better than stock. Hard anodized oval shaped aluminum muffler.TIG welded reinforced muffler brackets. 304 stainless steel mid pipe. Red powder coated stainless steel end tip. Huge torque and horsepower gains. Sleek muffler design allows for maximum clearance. Removable screen type spark arrestor included. ATV Galaxy is an authorized Big Gun dealer located in Irvine, California. Listing and template services provided by inkFrog. The item "Big Gun EVO R Slip On Exhaust Pipe Muffler Yamaha Raptor 660 660R All Years" is in sale since Wednesday, September 12, 2012. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Exhaust". The seller is "atvgalaxy" and is located in Irvine, California. This item can be shipped worldwide.