2004 Mack R Series Mufflers
- Walker®Heavy Duty Steel Round Aluminized Exhaust MufflerMack RD600K / RD600P / RD600S / RD600ST / RD600SX /... with Single Exhaust 2004, Heavy Duty Steel Round Aluminized Exhaust Muffler by Walker®. Muffler Inlet Diameter: 4". Muffler Configuration: Center - Center. With their extensive...Makes installation quick and easyAn economical replacement for OE components$99.55 - $154.98