What is the benefit of the Power Bomb module?

The Power Bomb module is a patented FMF design that acts as a pre-muffler. It helps manage exhaust sonics, increases flow by nearly 10%, and provides more sound-absorbing surface area to help lower the overall sound output of your ATV.

What material is this header made from?

This header is constructed from stainless steel. This material is chosen for its ability to withstand high temperatures and resist corrosion, making it a durable choice for exhaust components.

Will this header fit my 2009 Honda TRX400X?

While this header is listed for the 2001-2008 Honda TRX400EX Sportrax, FMF Racing also lists it as compatible with the 2009-2014 Honda TRX400X. Please verify fitment for your specific model year.

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

Specifications

Brand: FMF Racing
Part #: 040014

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

Name: FMF Racing Honda TRX400EX 99-08/TRX400X 09-14 SS Powerbomb Header
Brand: FMF Racing
Price: 357.75 USD
Availability: InStock

$357.75

On Backorder — Expected to ship by Mar 29, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2001-2008 Honda TRX400EX Sportrax. This FMF Racing header improves exhaust flow and helps reduce sound output.

Key Features

Fits 2001-2008 Honda TRX400EX Sportrax.
Features FMF's patented Power Bomb module for improved exhaust flow.
Increases exhaust flow by nearly 10% compared to stock.
The Power Bomb module acts as a pre-muffler, helping to lower sound output.
Constructed from stainless steel for durability and corrosion resistance.
Designed for a direct fit installation on compatible Honda models.

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Fits this vehicle

Honda TRX400EX Sportrax 2001-2008

Product Details

When you're looking to get more out of your Honda TRX400EX Sportrax, especially for trail riding or performance applications, upgrading the exhaust header is a smart move. This FMF Racing SS Powerbomb Header is designed specifically for your 2001-2008 TRX400EX, and it's built to make a noticeable difference in how your ATV performs.

FMF's patented Power Bomb module is integrated into the header at a key spot. This isn't just for show; it's a functional piece that helps manage exhaust sonics. By carefully placing this module, FMF has achieved an almost 10% increase in exhaust flow. The perforated core inside the Power Bomb lets sound waves escape into the packing material, which then allows the gases to expand and cool. Think of it as a pre-muffler that adds sound-absorbing surface area, helping to keep your ATV's noise level down while still letting the engine breathe easier.

This header is made from stainless steel, which is a solid choice for exhaust components because it holds up well to heat and the elements. It's a well-built part that's designed to fit right onto your TRX400EX, making the installation process straightforward. You'll likely notice improved throttle response and a bit more power, especially in the mid-range RPMs where the Power Bomb module really shines.