FMF Racing Honda TRX400EX 99-08/TRX400X 09-14 SS Powerbomb Header

A 4-Stroke header system that incorporates FMF's patented Power Bomb module at a precise location in the initial stage of the header system; by positioning the "Bomb" at this key point, the expansion and contraction of exhaust sonics through the system resulting in a flow increase of nearly 10%. The surface of the perforated core lets the sound exit into the absorbing material (steel wool packing) and then allows the air to expand, cool and ramp back up at higher air pressures (RPMs). The Power Bomb is a "pre-muffler" of sorts, which helps to lower the bike's sound output because it provides more sound-absorbing surface area to allow the exhaust gases to become absorbed. Fitment: 2001 Honda TRX400EX Sportrax Base 2002 Honda TRX400EX Sportrax Base 2003 Honda TRX400EX Sportrax Base 2004 Honda TRX400EX Sportrax Base 2005 Honda TRX400EX Sportrax Base 2006 Honda TRX400EX Sportrax Base 2007 Honda TRX400EX Sportrax Base 2008 Honda TRX400EX Sportrax Base