01-05 YFM660R P-BOMB SS PIPE, FMF 040074 POWERBOMB HEADER

YAMAHA
ATV SPORT
YFM660 RAPTOR 01-05

PART NUMBER 06-240.FMF.PB (OFF ROAD ONLY)

FMF 040074

The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The  outer chamber  in the Powerbomb  allows the air to expand, cool and ramp back up at a higher velocity.

Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range.