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FMF PowerBomb Header Review Product Review: FMF PowerBomb Header

The FMF PowerBomb product information says the following:

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.


The PowerBomb header fits perfectly.


The PowerBomb header is available in stainless steel or titanium. The PowerBomb section is welded to the header tubing. The engine exhaust port flange is machined from billet aluminum.


This product is very good looking. The welds are very good and the finish is excellent. From the perspective of appearance, the PowerBomb header will not disappoint.


I have been using the PowerBomb header on my 2010 KXF 450 in combination with the stock muffler. The KXF 450 already has plenty of power and torque, but I bought the PowerBomb because I broke the stock header. Honestly, I really haven't noticed much difference in engine performance. If my bike is making more horsepower, I do not notice it. Perhaps it would depend on the specific application. I did notice a pleasant change in the sound, however. The typical loud bark of the KXF is now a little softer and it seems that the throttle response is smoother.


I did not buy the FMF PowerBomb header for improved performance, but rather because of a broken header. My current riding ability is limited enough that more power is not going to help me. Regardless, I love the PowerBomb header and do not hesitate to recommend it. It is a product with outstanding quality and fit. Just don't expect it to make miracles happen. It will, however, fit great, look good, hold up to abuse and may improve performance slightly.

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Post Date: Apr 27, 2011
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