FMF Stainless Steel PowerBomb Header

Item Number: 325342

5 stars 1 Review

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Product Description

FMF Racing

FMF Stainless Steel PowerBomb Header

  • The redesigned PowerBomb is a four-stroke header that incorporates FMFs 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
  • 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)

Spec Details
Configuration Varies (make selection above)
Country of Origin USA
Material Stainless Steel

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.


  • 450 RR Enduro 2010-2014


  • DS450 2008-2011


  • CRF150R 2007-2009, 2013-2014
  • CRF230F 2003-2009, 2012-2017
  • CRF230L 2008-2009
  • CRF230M 2009
  • CRF250R 2004-2013
  • CRF250X 2004-2009, 2012-2013
  • CRF450R 2002-2008, 2011-2012
  • CRF450X 2005-2009, 2012-2014
  • TRX400EX FourTrax 400EX 1999
  • TRX400EX Sportrax 400EX 2000-2008
  • TRX400X Sportrax 400X 2009-2010, 2012-2014
  • TRX450R Sportrax 450R 2004-2014
  • TRX700XX 2008-2009
  • XR400R 1996-2004
  • XR600R 1985-1987, 1991-1998, 2000
  • XR650L 1993-2009, 2012-2014
  • XR650R 2000-2005


  • TC 250 2010-2011
  • TXC250 2010-2012


  • 250 SX-F 2011-2012
  • 250 XC-F 2011
  • 250 XCF-W 2012-2013
  • 350 SX-F 2011-2012
  • 350 XC-F 2011-2012
  • 350 XCF-W 2012-2014
  • 400 XC-W 2009-2010
  • 450 EXC 2009-2011
  • 450 EXC-R 2008
  • 450 MXC-G Racing 2004-2005
  • 450 SX 2006
  • 450 SX ATV 2009-2010
  • 450 SX-F 2007-2012
  • 450 XC 2007
  • 450 XC-F 2009
  • 450 XC-W 2007, 2009, 2012-2014
  • 450 XCR-W 2008
  • 500 EXC 2012-2016
  • 505 SX ATV 2009-2010
  • 505 SX-F 2008
  • 505 XC-F 2008-2009
  • 525 EXC-G Racing 2004-2006
  • 525 MXC-G Racing 2004-2005
  • 525 SX 2006
  • 525 SX Racing 2004-2005
  • 525 XC 2007
  • 525 XC-W 2007
  • 530 EXC 2009-2011
  • 530 EXC-R 2008
  • 530 XC-W 2009
  • 530 XCR-W 2008
  • 690 Enduro 2008
  • 690 SMC 2008-2010


  • KFX400 2003-2006
  • KFX450R 2008-2014
  • KLX250S 2006, 2009-2014
  • KLX250SF 2009-2010
  • KLX400R 2003-2004
  • KLX400SR 2003-2004
  • KLX450R 2008-2009
  • KX250F 2004-2014
  • KX450F 2006-2014


  • DR650SE 1997-2014
  • DR-Z400 2000-2004
  • DR-Z400S 2000-2014
  • DR-Z400SM 2005-2009, 2012-2014
  • LT-Z400 QuadSport 400 2003-2014
  • RM-Z250 2004-2012
  • RM-Z450 2005-2007, 2011-2014


  • WR250F 2001-2013
  • WR250R 2008-2017
  • WR250X 2008-2011
  • WR400F 1998-2000
  • WR426F 2001-2002
  • WR450F 2003-2014
  • YFM125R Raptor 125R 2011-2013
  • YFM250R Raptor 250 2008-2013
  • YFM350R Raptor 350 2005-2013
  • YFM350X Warrior 1987-2004
  • YFM660R Raptor 660R 2001-2005
  • YFM700R Raptor 700R 2006-2014
  • YFZ450 2004-2009, 2012-2013
  • YFZ450R 2009-2014
  • YFZ450X 2010-2011
  • YZ250F 4-Stroke 2001-2013
  • YZ400F 1998-1999
  • YZ426F 2000-2002
  • YZ450F 2003-2009

Customer Reviews

No complaints

out of 5
5 stars

By on February 15, 2017

Looks and runs outstanding with my FMF muffler on my YFZ450.

5 stars
5 stars

Questions & Answers

  • What is the expected HP increase with one of these pipes? What should it be paired with for best performance?

    2013 KTM 250 xcf-w

    By: Todd

    It's hard to say exactly what kind of power gain you can expect from any exhaust without knowing exactly how your 2013 KTM 250 XCF-W is configured (air filter, airbox mods, fueling, &etc.). With proper tuning (jet kit, Power Commander, Bazzaz Z-Fi - all of which you can find in our store), you can certainly expect an increase in power output, but most importantly, you'll notice improved throttle response and better drive off the corners.

    By: Staff

  • Will this pipe fit my oe mid pipe with oe muff on 2007 kx450f

    By: jeff

    No, FMF headers only work with FMF mufflers. The reason for this is due to the fact that FMF's mufflers come with an adapter that's designed to fit the OEM header, but can then be removed later on when you purchase an FMF header. That is to say, the size of the outlet on FMFs' headers are different than stock and won't fit the OEM muffler.

    If you'd like to stick with the OEM muffler for sound output reasons, you could match that header with an FMF Q4 slip-on muffler. That particular unit is designed to be a little quieter than a full-on race system.

    By: Staff

  • Will it fit with stocke Oem exhaust on 150r?

    By: Guest

    No - FMF headers are designed to work only with FMF mufflers. You would need to purchase an FMF muffler in order to have it fit this, or any other FMF header we have for sale. This is due to the fact that FMF headers almost always have a wider diameter than the stock muffler so as to permit greater exhaust gas flow and more power.

    By: Staff

  • Will this fit with a gytr slip on? I'm running the factor head pipe now on my 2007 YFZ450.

    By: Brett

    In the case of the YFZ450 ATV, the GYTR muffler will not work with the FMF header. FMF's header pipes are almost all designed to work only with FMF mufflers as they are of a different diameter than the stock pipe in order to produce as much power as possible. It is for this reason that FMF mufflers come with a spacer to accommodate the OEM head pipe. You're to remove that spacer when installing an FMF PowerBomb or MegaBomb header.

    For your particular needs, you may wish to go with a YFZ450 FMF Factory 4 Full Exhaust System. With that, you'll get the best possible exhaust flow and maximum power output. Just be sure to get the proper FMF YFZ450 jet kit to go with it in order to adjust fuel delivery accordingly.

    By: Staff

  • I've got a 2005 yfz and I bought the gytr exhaust will this header match up

    By: Silver

    Unfortunately, no - this header won't fit anything other than the OEM or FMF muffler. This is due to the fact that FMF mufflers come with a spacer to fit the OEM head pipe. To fit that same FMF muffler to a FMF header, you simply omit that spacer to make it fit. While other aftermarket mufflers may come with a spacer, it's unlikely they're of the same inlet diameter that the FMF header requires. For that reason, it will not fit.

    By: Staff

  • Will this fit a Lexx Mxe exhaust

    By: Guest

    FMF's headers are designed to work with the OEM muffler, or an FMF muffler only. Due to the different diameter at the header's outlet, they will not fit any other type of aftermarket muffler. The reason FMF mufflers fit FMF pipes is because they ship with a spacer that'll bring the muffler's inlet diameter down to the correct size that'll fit the stock header. When you later upgrade to an FMF header, you simply remove that spacer so everything fits together nicely. For these reasons, this header will not fit a Lexx Mxe muffler.

    By: Staff

  • How will this affect fuel consumption?

    By: WR250 Rider

    Both items will certainly increase fuel consumption, though exactly how much, is difficult to say. If you're riding an offroad bike with the original size fuel tank on it, you probably won't notice any significant difference in distance traveled when you switch to reserve or run out of fuel. Though, if you were to have a larger aftermarket tank installed, it's quite possible you may notice a slight difference in distance before running on empty. If your bike were properly tuned for fuel delivery, it's likely you won't even get near a 10% increase in fuel consumption.

    By: Staff