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FMF Megabomb Header - Titanium
FMF Megabomb Header - Titanium

$269.99 - $449.99
10% Off - Save up to $50.00

Item #FMF0005

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37 Reviews
4.6 out of 5 stars
5 Star   31 4 Star   2 3 Star   0 2 Star   2 1 Star   2
All Reviews
Weitman Verified Purchaser
1 month 21 days ago Kansas, USA
Durability4/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Sick looks

No matter if your racing or just riding around this exhaust helps with the bottom end power definitely worth the purchase!

Bryant Verified Purchaser
Over 5 months ago Cali
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
This is the best upgrade to your bike!

This gave my bike so much more horsepower. Now I can pull wheelies anytime with instant throttle response compared the stock pipe. I recommend this pipe as one of the first mods you do to your bike and is well worth the money.

Brapp34 Verified Purchaser
Over 5 months ago California
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Super clean look and fast shipping

This thing is off the charts good, for the full system... this with the 4.1RCT silencer is the best in the market hands down.

Lucky Verified Purchaser
2 years 4 months ago

Chilly Verified Purchaser
2 years 8 months ago Colorado
Durability4/5Ease of Installation5/5Performance5/5Power5/5Style5/5

Got rct 4.1 w titanium header on my 16 kx 450 looks and sounds beyond amazing. Feel way more responsive low end power

Antonmoto Verified Purchaser
Over 3 years ago Portland, OR, USA
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Worth the money

Power improvement, bike runs quite a bit more smooth than oem.

Mario Verified Purchaser
Over 3 years ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5

Over 4 years ago Phoenix, AZ, USA
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Instant POWER

I gotta admit I was pretty excited to get my new fmf megabomb header and I was pretty upset when I found out the previous owner had switched the midpipe gasket out so my megabomb didn't fit not to worry though sent a brand new gasket that fits free of charge
After that it only took 5 Minutes to bolt on and the power increase was so great it almost felt like my 1st time on a bike again.
Thanks you da bomb.

NoFearJay88 Verified Purchaser
Over 5 years ago Port Orchard, WA, USA
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Mega Bombin!

Awesome Header! My 05 Yfz450 is a whole different bike after i installed the Mega Bomb. Highly Recommend this Header!

Over 6 years ago New Jersey, USA
Durability4/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Looks great performs just as good

noticeable bolt on power and makes the bike look sweet. just put one on a 2012 yz250f and definitely felt more top end. would recommend rejetting your bike after installation.

See 10 More Reviews
44 Questions
Answered:   44
Not Yet:   0
Q: What’s the recommendation for jetting with this header installed on a 2007 yfz450. Recently purchased it from a friend who never rode it and it glows red hot after a few minutes of just idling 
4 months 3 days ago
Top 25
4 months 3 days ago
A: We unfortunately cannot give jetting recommendations due to the unknown factors such as fuel being used and elevation you are at. I would suggest giving your local shop to see if they have any recommendations or JD jetting may have some advice. JD jetting can be reached at 360-350-0557
Q: Would this work on my 2018 crf450r that I have a fmf single slip on
4 months 26 days ago
Top 10
4 months 26 days ago
A: The FMF Megabomb Header - Titanium for the 2017-2018 CRF450R has two muffler outlets. The original exhaust system from Honda had two mufflers.

To find a muffler to fit your single header pipe, we will need to know the FMF part number on your header pipe.
Q: Will this be a good fit with the Q 4 muffler?
Over 5 months ago
Top 10
Over 5 months ago
A: The Megabomb and Q4 will pair great together giving you a nice strong torque curve while adding to the mid and top end range also.
Q: Is the decibel sounds lose noticeable? I have a 2015 Crf250r with the fmf 4.1 RCT slip on, and love how it sounds and don’t want to loose any of that sound. 
Over 8 months ago
Top 10
Over 8 months ago
A: The FMF Megabomb Header on your 2015 Honda CRF250R with the FMF 4.1 RCT will reduce noise by about 1 to 1.5 dB, and improve performance.
Q: Would i need to purchase any extra exhaust pipe with this header if i was to buy the Dual fmf exhaust as well?
2 years 6 months ago
MotoSport Staff Expert
2 years 6 months ago
A: If you are considering the FMF Factory 4.1 RCT Slip-On Exhaust - Dual you can use this header with it.
Q: Does this header fit on a 2013 yfz 450 carborated?
Over 3 years ago
MotoSport Staff Expert
Over 3 years ago
A: Just be sure to correctly select the Year/Make/Model of your ATV before ordering so we can be sure to send you the correct header for your ATV. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Q: Will a yoshimura rs-2 slip on fit on this header?
Over 3 years ago
MotoSport Staff Expert
Over 3 years ago
A: FMF headers, whether it be the PowerBomb or the MegaBomb, are fitted to match an FMF series muffler. We do not recommend or guarantee you try to match it to a stock muffler or other after market muffler.
Q: Stainless steel to titanium?
Over 3 years ago
I have a 2015 CRF250r and I switched to the FMF 4.1 single sided exhaust. I bought the aluminum slip on with stainless steel mid pipe. I’m curious if the titanium header will fit with the aluminum slip on with stainless steel mid pipe? Or will I have to get the stainless steel header?
Over 3 years ago
A: It will slip on... I have the same set up you're asking about.. titanium header to stainless mid pipe
MotoSport Staff Expert
Over 3 years ago
A: Yes the FMF stainless header will work with the FMF titanium muffler.
Q: Can I use a big gun exhaust or a different brand slip on with the megabomb
Over 3 years ago
MotoSport Staff Expert
Over 3 years ago
A: FMF headers, whether it be the PowerBomb or the MegaBomb, are fitted to match an FMF series muffler. We do not recommend or guarantee you try to match it to a stock or other brand aftermarket muffler..
Q: I have a crf150r will I still need to jet it and what gasket would I need to get this thing to work
Over 4 years ago
Expert MotoSport Staff
Over 4 years ago
A: Jetting can be very tricky, there isn't one setting that will work everywhere with every bike. It would really depend on your location (altitude/temperature) and how your bike is running with the current jetting. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there. The OEM gaskets can be found in our OEM section here:
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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Standard 044299
Standard 044316
Standard 044422
Standard 044140
Standard 044227
Standard 044332
Standard 044403
Standard 041296
Standard 041376
Standard 041197
Standard 041492
Standard 042181
Standard 042277
Standard 043238
Standard 043341
Standard 043310
Standard 041233
Standard 041520
Standard 041539
Standard 042339
Standard 042344
Standard 045363
Standard 042366
Standard 044450
Titanium 044440
Standard 041554
Standard 041574
SX Style 042379
Standard 043369
Standard 045621
Standard 045623
Standard 045625
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