Lexx Performance Exhaust Kawasaki KLR650 2008-2013 Engineered to improve torque and acceleration with an increase of up to 4 horsepower on some machines. Lightweight design saves up to 3.5 lbs over the stock exhaust. Included 46mm Race Tip for closed course competition. Includes Forest Service approved Quiet Core Spark Arrestor Insert that brings sound levels down below 96db. Optional tuning exhaust tips and optional screen type Spark Arrestor are available to allow user to further tune power and sound characteristics.