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FMF Megabomb Header - Stainless Steel
FMF Megabomb Header - Stainless Steel

$247.49 - $427.99
10% Off - Save up to $47.00

Item #FMF0006

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31 Reviews
4.7 out of 5 stars
5 Star   24 4 Star   6 3 Star   0 2 Star   0 1 Star   1
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All Reviews
Durability4/5Ease of Installation4/5Performance5/5Power5/5Style4/5
Feel the difference with this fmf megabomb

very clean installation '16 yz250f

Verified Purchaser
Durability4/5Ease of Installation4/5Performance4/5Power4/5Style4/5
Quality item

Bought this to replace the one we dented. It is of the build quality you expect from Motosport.com and FMF

Top 1000 Verified Purchaser
New Mexico
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Awesome aftermarket exhaust

Great exhaust! Good fit and Quality Fabrication. A noticeable difference over stock when combined with the 4.1 FM F muffler I have used FMF products since the two stroke days and have always been impressed. Made in the USA.

Verified Purchaser
Vancouver, WA, USA
Durability5/5Ease of Installation4/5Performance5/5Power5/5Style5/5

I bought this mega bomb header for my 2017 WR450F. I had already purchased the FMF tuner & spark arrest previously and already ran that before the mega bomb addition. Installation is a bit tricky getting the u shaped tube off from factory, and then finagling the new FMF pipe into place around the head, and minimal space between the frame. At one point I was convinced the engine would have to be moved to get the darn thing in!! After a half hour of some very choice swear words, It finally popped into place.Sounds slightly quieter, and has an amazing low end response that clearly was not there before. Have not had a real days ride with it so cant give a true response on total performance. I can say it looks great, installed together as described, and I'm overall pleased with the entire package. I will add that looking into the internal welds, that they really burned through and left some slag that I did not expect to see. This does create drag on flow....therefore I was hesitant to give the full 5 star rating. I believe that FMF builds a superior well tested product, but I would like to see the detail of buffing out the penetration from the welds.I know I read a lot of comment of how you need a heat shield, or you will burn your boots... and I fail to see a difference from the factory pipe from the FMF mega bomb. The portion of the pipe that has the bellow is far away from contacting anything. I like the fitment!!

Verified Purchaser
soth louisana
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Good looking great sound perfect fit

Bought the mega bomb,4-1 ex.and the jd jet kit, very happy with the product and the service from motosport

Verified Purchaser
Durability5/5Ease of Installation5/5Performance4/5Power4/5Style5/5
Da bomb

Very happy about the buy.. went right on no problems .. Did burn my boot a bit no big deal.

Verified Purchaser
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Smooths out the power band

Works great, lots of power, fast off the line.

Verified Purchaser
Frederick, Maryland
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Everything I️ expected and more!

I️ bought this to add power and dampen the sound, and was amazing by the results. I️ have a 2004 yz250f and you can’t go wrong with the power of the mega bomb. This also has my bike set up with a full fmf exhaust which has been an excellent purchase.

Verified Purchaser
Denham Springs La
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Perfect fit

Bought this for my sons bike. It was a perfect fit and great craftsmanship. Made a nice improvement on higher rpm performance.

Verified Purchaser
Durability4/5Ease of Installation5/5Performance4/5Power4/5Style4/5

See 10 More Reviews
40 Questions
Answered:   33
Not Yet:   6
Q: Can I use this header with my pro circuit ti-6 muffler?
15 days ago
Q: I have 2007 Crf250r dual exhaust. Now, question is for the megabomb header does come single or dual? Also, what can I put with it for the slip on exhaust?
3 months 8 days ago
Top 10
3 months 8 days ago
A: The original exhaust system on the 2007 to 2009 CRF250R uses a single header-pipe, a "Y" shaped mid-pipe to split to the mufflers, and two mufflers.
The FMF Megabomb Stainless Steel Header to fit your CRF250R is a single header pipe, with the same fit as the original from Honda. This will fit with your original Honda Y-pipe and mufflers.
FMF would recommend their Powercore 4 racing muffler, or their Q4 spark arrestor muffler for trail riding. Both FMF and Motosport are temporarily sold out of these mufflers to fit your 07-09 CRF250R.
Q: Will this fit with the stock muffler on my 2013 rmz250
3 months 28 days ago
Top 10
3 months 28 days ago
A: Yes, the FMF Megabomb Header will fit the stock Suzuki muffler on your 2013 RMZ250.
Q: Will this fit OEM mufflers ? 06 crf250r
Over 5 months ago
Top 10
Over 5 months ago
A: Yes, the FMF Megabomb Header will fit with the stock muffler on your 2006 Honda CRF250R.
Q: How much horse power will this add to a 2008 Honda 150r
Over 6 months ago
Top 10
Over 6 months ago
A: This header itself is just a canister, and is part of a whole upgrade to your AFR(air fuel ratio), alone it adds minimal HP, however, if you do a full system, find a way to increase fuel distribution, and introduction of more air to this, than yes it will add more horsepower and make more of a difference.
Q: Can I use the  mega bomb header with a  yoshumia Muffler
Over 6 months ago
Top 10
Over 6 months ago
A: No, they will not fit.
Q: Can I use this header with my OEM pipes on my 2016 CRF 450R
Over 6 months ago
Top 1
Over 6 months ago
A: You should be able to use this header with your OEM muffler.
Over 6 months ago
Top 10
Over 6 months ago
A: It will be dependent on the year of the crf250l to determine the fitment.
Q: I have a powercore 4 slip on. Will this fit with that? And does it come with the programmer 
1 year ago
Top 10
1 year ago
A: Yes this will work with any FMF slip on exhaust. No a programmer is not included.
Q: What's the main difference between the Megabomb and the Powerbomb? I have a WR250R that I'd like to get a little more bottom end out of.
1 year ago
Top 10
1 year ago
A: The Megabomb will get you the bottom end you are wanting and has more power gains than the Powerbomb. Also have a larger expansion cavity will help reduce sound output as well.
1 - 10 of 40

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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
FMF Megabomb Header - Stainless Steel N/A
Standard N/A
Standard Dual N/A
Standard Single 041555
Standard 041566
Standard 042251
Standard 041426
Standard 041431
Standard 041427
Standard 041428
Standard 041485
Standard 041429
Standard 041430
Standard 041459
Standard 041491
Standard 042249
Standard 042250
Standard 042276
Standard 043286
Standard 043340
Standard 043287
Standard 043309
Standard 041433
Standard 044358
Standard 044350
Standard 044351
Standard 044352
Standard 044421
Standard 044353
Standard 044354
Standard 044402
Standard 045498
Standard 041519
Standard 041538
Standard 042338
Standard 044356
Standard 044357
Standard 042343
Standard 045362
California Proposition 65

WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.

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