PowerBomb Header FMF Racing Stainless Steel 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 air higher 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.

2009	Yamaha	YFZ450R
2010	Yamaha	YFZ450R
2011	Yamaha	YFZ450R
2012	Yamaha	YFZ450R
2013	Yamaha	YFZ450R
2014	Yamaha	YFZ450R
2015	Yamaha	YFZ450R
2016	Yamaha	YFZ450R
2017	Yamaha	YFZ450R
2010	Yamaha	YFZ450X
2009	Yamaha	YFZ450RSE
2010	Yamaha	YFZ450RSE
2011	Yamaha	YFZ450RSE
2012	Yamaha	YFZ450RSE
2013	Yamaha	YFZ450RSE
2014	Yamaha	YFZ450RSE
2015	Yamaha	YFZ450RSE
2017	Yamaha	YFZ450RSE