FMF Racing Powerbomb Stainless Header for Yamaha YZ400F 98-99/YZ426F 00-02/WR400 98-00/WR426F 01-02

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.

Specifications

Notice: Closed Course Use Only
Item ID: 040050
Type: Header
Carb Warning: no
Header Const: Stainless Steel
Header Type: PowerBomb
Version: Moto
Weight: 1.1 lbs.