Lexx Slip On Exhaust With Midpipe.  Fits YAMAHA WR450F Models From 2003-2006.

Fits With Stock Header Only

• Fully tunable exhaust system allows the user to change from a race exhaust (46mm Race Tip) to a forest friendly silencer (Quiet Core Insert) with just three bolts.
• 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.
• Constructed of lightweight 6061 T6 aluminum and durable 304 stainless steel.