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FMF Stainless Steel MegaBomb Header

(4 reviews)

Item: 326012

$292.49 – $472.49

Select Your Vehicle - Fitment Guaranteed

FMF Stainless Steel MegaBomb Header


The science behind FMF's MegaBomb header may be their greatest engineering accomplishment to date. You can bolt on a MegaBomb with an existing FMF Racing slip-on for as much as a 3hp boost, plus the MegaBomb actually reduces noises levels by as much as 1.5 dB. FMF MegaBomb technology is specifically designed to produce more low-end to mid-range gains as well as broadening out the mid to top-end power gains when compared to the stock exhaust - a feat unimaginable via conventional header pipe design! The MegaBomb is best used for motocross/supercross riding and GNCC style trails. Used by Factory Teams, the MegaBomb is the next level technology that you can have today.

Only fits machines equipped with FMF muffler

  • Produces long header torque and short header over-rev
  • Reduces sound output as much as 1.5 dB
  • Increases output from stock motor as much as 3hp
  • Made from premium American materials
  • Runs extremely well with sound-restricted mufflers
  • Made in the USA
Specification Details
Configuration Varies (make selection above)
Country of Origin USA
Header Construction Stainless Steel
Material Varies (make selection above)
Mid-Pipe Varies (make selection above)

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.

Beta
  • 350 RR Enduro 2020
  • 390 RR Enduro 2020
  • 430 RR Enduro 2020
  • 480 RR Enduro 2020
Gas Gas
  • EC 250F 2021-2022
Honda
  • CRF150R 2007-2009, 2013-2021
  • CRF250L 2013-2016
  • CRF250R 4-Stroke 2014-2017, 2022-2024
  • CRF450R 2017-2024
  • CRF450RX 2017-2018
  • CRF450X 2019-2021
Husqvarna
  • FC 250 2016-2022
  • FC 350 2019-2022
  • FC 450 2018-2022
  • FE 250 2016-2017, 2020-2022
  • FE 350 2016-2022
  • FE 450 2016-2020
  • FE 501 2017-2023
  • FX 350 2019
  • FX 450 2019-2020
KTM
  • 250 SX-F 2016-2022
  • 250 XC-F 2016-2022
  • 350 EXC-F 2017-2019
  • 350 SX-F 2019-2022
  • 350 XC-F 2019-2022
  • 350 XCF-W 2021-2022
  • 450 EXC-F 2017-2018
  • 450 SX-F 2015, 2019-2022
  • 450 XC-F 2015, 2019-2022
  • 500 EXC-F 2017-2019
  • 500 XCF-W 2020-2022
Kawasaki
  • KX250 4-Stroke 2019-2024
  • KX250F 4-Stroke 2017-2018
  • KX250X 4-Stroke 2021-2024
  • KX450 4-Stroke 2019-2023
  • KX450F 2016-2018
  • KX450X 4-Stroke 2021-2023
Suzuki
  • RM-Z250 2019-2024
  • RM-Z450 2011-2024
  • RMX450Z 2017-2019
Yamaha
  • WR250F 2015-2024
  • WR450F 2019-2020
  • YZ250F 4-Stroke 2014-2024
  • YZ250FX 4-Stroke 2015-2024
  • YZ450F 2018-2024
  • YZ450FX 2019-2023

Customer Reviews

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Women's Yamaha Racing

By   on  Verified Purchaser

This S.S. header pipe is just as good as the titanium header pipe. And it weighs about a pound different. Best of all it is a couple hundred bucks less. Definitely worth the investment to make more horsepower. Throttle response is noticeable right away.


Completed my exhaust

By   on  Verified Purchaser

Completed my exhaust, great price. Now I need my knee to heal so I can see how this puppy is going to perform.


Mega sweet!

By   on 

Moderate install on an older WR450F. Teardown was worse than the install. The pipe appears to be well made and looks great. The best part about it is the low end power. Worth every cent as the bike powers out of corners now instead of lugging along.


Love it

By   on  Verified Purchaser

Added the pipe, Q4, and CF heat shield, yes too pricey but runs great, easy great fit, nice but not load sound, On a KLX250s


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Questions & Answers

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will this fit my 2012 ktm 350 sx-f

So long as you have a FMF muffler to install it with, and you choose 2012 KTM 350 SX-F, you should have no problems with fitment.

By Andy
Answer Question

Will it fit a hmf exhaust

FMF headers will only fit machines equipped with a stock or an FMF muffler. This is due to the fact that most FMF headers have an outlet with a different diameter than the stock muffler on your bike. To avoid problems with users who fits buy an FMF muffler, and then later add an FMF MegaBomb header, for example - the manufacturer includes an adapter to fit the FMF muffler to the stock head pipe. When you add an FMF header, you simply do not use the adapter sleeve and the FMF muffler will slip straight over the FMF header for a flawless, leak-free fit.

By Staff
Answer Question

Will this header fit over my fmf powercore 4

FMF's MegaBomb headers are indeed designed to work with FMF mufflers. One thing that's important to know, however, is that some of those mufflers may come with an adapter sleeve so you can configure it to fit the stock, or FMF header. Usually, there's only one sleeve included with the muffler to have it fit the OEM header, but sometimes there's another sleeve that's included for fitting that muffler to the FMF header. So long as you have all of the original hardware that came with your PowerCore 4, you should have no problem installing this FMF MegaBomb header on your machine.

By Staff
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