SBK Oval exhaust systems are powerful, durable and most importantly affordable, providing significant weight savings and increased horsepower. They are designed to run with stock jetting or fuel injection settings  Serious performance boost at an entry level price All 304 stainless steel internal silencer construction Available with aluminum or real carbon fiber canister sleeve Significant weight savings over stock Slip-ons boost horsepower an average of 5% across RPM range Pipes made of TIG welded 304 stainless steel Aluminum canister straps Aluminum and 304 stainless steel mounting hardware kit included Produces deeper tuned tone at a reasonable sound level EVOII silencer insert removable for more aggressive tone CAD/CAM designed for precise fit Machine-specific tuned to work with stock fuel settings