FMF Racing Factory 4.1 RCT Titanium With Carbon End-Cap Full System MX Exhaust Rails & Accessories In 2010 the RS-4 muffler

In 2010 the RS-4 muffler helped Ryan Dungey claim the AMA 450 Supercross and Motocross championships in his rookie season

Zipper and button snap closures

increased horsepower and rugged durability all at a price that won't break the bank

the Ti-6 will meet AMA amateur noise requirements and comes equipped with a removable USFS approved spark arrestor

FMF Racing Factory 4.1 RCT Titanium With Carbon End-Cap Full System MX Exhaust Rails & Accessories In 2010 the RS-4 mufflerFMF Factory 4. 1 RCT Full System If you are looking to drop weight, improve looks and most importantly improve your bikes power band then look no further. The FMF Factory 4. 1 RCT full system is constructed from aerospace grade materials that meet FMF's exacting specifications and is 100% manufactured in their Southern California factory. The patented MegaBomb header design allows exhaust gases to expand, cool and ramp back up at a higher velocity.