• 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
• AMA 94db sound insert installed
• For optional spark arrestor order 43-4673

Included Items:
(1) Aluminum muffler with carbon fiber endcap and removable baffle
(1) Stainless steel mid-pipe (installed)
(2) Springs
(1) Stainless steel head pipe (installed)
(1) Rubber grommet
(1) Aluminum flange insert
(1) Max sound insert
(1) 6mm-1.00 x 12mm button head bolt
(1) 6mm outside star lock washer
(1) Muffler wash plug
(1) Spring puller tool
Instructions