• The work that went into developing the RS-4 muffler has paid big dividend in Off-Road Racing; winning multiple Supercross and Motocross titles since it's inception
• The current generation RS-4 is based on that research and development, and the result is a unique design that provides and unrivaled combination of power and quiet exhaust tone
• The RS-4 features a Polyresonant duplex chamber and two staged stepped baffle for increased performance while a carbon cone end cap finished off it's innovative styling
• Pentagonal shaped sleeve
• Front muffler cap functions as a polyresonant chamber which helps reduce noise
• Two-staged stepped baffle
• Carbon fiber end cap
• Stainless steel header and tailpipe
• Weight:  0.4 lbs lighter than stock configuration
• For optional spark arrestor use 43-4673

(1) Chrome aluminum muffler W/carbon fiber end cap

(1) Stainless steel header 

(1) Chrome aluminum header heatshield

(2) Header heat shield flange button head bolts

(1) Stainless steel tailpipe

(1) Exhaust band clamp

(1) Muffler spring

(1) 8mm Flat washer

(1) Rubber grommet

(1) Gold aluminum insert

(1) Muffler plug

(1) Spring tool

Instructions