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FMF Powercore 4 HEX Slip-On Exhaust
FMF Powercore 4 HEX Slip-On Exhaust

$305.99 - $404.99
10% Off - Save up to $45.00

Item #FMF000A

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35 Reviews
4.8 out of 5 stars
5 Star   31 4 Star   2 3 Star   1 2 Star   0 1 Star   1
All Reviews
Pfel Verified Purchaser
4 months 29 days ago Indiana
Durability4/5Ease of Installation4/5Performance4/5Power4/5Style4/5
Good price

I like the muffler with the spark arrestor included, i just wish the forestry sticker was stamped into the Metal instead of just a sticker, I wonder how long it will last in a hot muffler.

Samm Verified Purchaser
Over 5 months ago Chichester, NH
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Looks good, soounds good

Makes the CRF250L sound like a 4 stroke dirtbike should. No complaints. FMF always leading the pack,

Wr450sendIT Verified Purchaser
Over 6 months ago Michigan
Durability5/5Ease of Installation4/5Performance5/5Power5/5Style5/5
Amazing sound

I love the product i bought it for a 2017 wr450f i got large power gains and it was easy to install but for my bike the stock exhaust clamps happened to be way to big so if you get one buy a clamp for it just in case im happy i did now my bike runs and sounds better than before. All my friends said it sounded like a broken lawn mower until the new pipe changed everything!

brapp Verified Purchaser
Over 8 months ago california
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Perfect

installed this on my bad boy CRF450X and am absolutely amazed and pleased just thw eight alone, I also recently installed the FMF powerbomb header to complete the system. Thanks motosport luv u guys

Foxheadrider Verified Purchaser
Over 9 months ago Atlanta Ga
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Awesome Sound and increased torque!

Installed on my 2017 YZ450F. Love the sound and increased power! Very easy to install.

ConanRehm838 Verified Purchaser
Over 10 months ago Power, MT
Durability4/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Loud and meaty

I bought this a few months ago, so far it’s everything I expected, and then some. It makes the bike sound much more deep and throaty, improves performance, and makes it quite loud. There was a dent in the actual pipe before the muffler, but it was a factory feature. Spark arrestor works, and the pipe overall looks good and fits well. Would personally suggest the quiet core insert for long rides, as the sound travels very clearly though my helmet. Overall, great product and I am happy with it. I would suggest this product if you want your bike to sound deeper, louder, and perform better.

HayMaaan
1 year ago Nj
Durability5/5Ease of Installation1/5Performance1/5Power1/5Style5/5
Don't fit 2017 crf250l rally

I bought it doesn't fit the 2017 CRF250 rally everyone's crazy on here

Rockdylan
1 year 1 month ago Midland, Mi
Durability5/5Ease of Installation3/5Style5/5
Need a new clamp

I bought this and shipped super fast, was at my house in 2 days. However, the stock clamp for my exhaust (18 kx 250f) will not fit this pipe and this pipe didn’t come with a different size clamp. I had to go order one from the local shop.

Where this one attaches under the rear fender is slightly different as well. It fits well, however the stock bolt ends up being very long and hangs out over the tire, not a huge deal though.

Once I get it properly installed, the review will be updated.

Ryan Expert MotoSport Staff Verified Purchaser
1 year 3 months ago portland,or
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Super clean

Super clean look, very easy install, completely changed the sound of the bike with the powerbomb on 2017 crf250L

Michael
1 year 3 months ago Brockton, MA
Durability5/5Ease of Installation4/5Performance5/5Power5/5Style5/5
Amazing Muffler!

Received this muffler in the mail yesterday, and one ride after the installation I am already impressed. Bought this for my CRF250L, and the sound it produces now is amazing. It also eliminates any top-end bog that the bike had before. There is definitely a noticeable difference, and it is a good one. I would definitely recommend getting this muffler for your bike. It adds a nice smooth feel and an amazing sound.

See 10 More Reviews
28 Questions
Answered:   26
Not Yet:   2
Bloody raptor 19
Q: What tuner would work best for this slip on, on my 2019 raptor 700r ?? 
Over 5 months ago
Trevor Gearhead
Top 10
Over 5 months ago
A: Fuel management systems vary in functionality. Feel free to give us a call and we'd be happy to elaborate.
Mike
Q: I got a 2019 raptor 700r will this be a great pipe for it? Do I need to get extra clamps also if I get this one 
Over 5 months ago
Trevor Gearhead
Top 10
Over 5 months ago
A: This is a great pipe. But I don't know what kind of riding you are doing, I may suggest something else based on that. No additional hardware is required.
desean
Q: If I buy this exhaust for the stock header on the raptor 700 will it fit and if it do can I buy fmf header pipe later will it fit
Over 7 months ago
Michael
Top 10
Over 7 months ago
A: That is correct, this will fit a variety of raptor 700's, just make sure to profile your Raptor in the site with the correct year to ensure "exact fit".
Wapas
Verified Purchaser
Q: Will the FMF 4.1 / 4.1C quiet core Spark Arrestor Insert fit this pipe too?
Over 7 months ago
Paul
Top 10
Over 7 months ago
A: We carry the FMF Powercore 4 HEX Spark Arrestor Insert to fit the FMF Powercore 4 HEX Slip-On Exhaust.
Moeorleans
Q: Considering purchasing this for my 09 klx 250sf. Would i have to do anything(tuning) to the bike or can i just put this on and ride?
Over 8 months ago
robert
Top 10
Over 8 months ago
A: It will be recommended to check the jetting when changing the exhaust.
Francois
Q: Is it legal to drive on the road with Honda CRF250L and this exaust equipped?
Over 9 months ago
Tyler Gearhead
Top 50
Over 9 months ago
A: That would largely depend on your local laws and regulations, and you would want to double check these prior to ordering this exhaust. FMF has noted that this exhaust is "LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENCED FOR USE, UPON A HIGHWAY. OUTSIDE OF CALIFORNIA, CHECK LOCAL AND STATE EMISSIONS REGULATIONS FOR COMPLIANCE"
Troy
Q: What size Exhaust clamp is required for this pipe to fit a 2018 Raptor 700
Over 9 months ago
Trevor Gearhead
Top 10
Over 9 months ago
A: This pipe does not connect via clamp. It connects using the stock mount.
Jay80
Q: Will this fit a 2019 KX 250F 
Over 10 months ago
robert
Top 10
Over 10 months ago
A: Their is a correct fit for you bike.
HEAVYD
Q: Does it backfire? and will it fit my stock yz450 2018 header?
Over 11 months ago
Trevor Gearhead
Top 10
Over 11 months ago
A: If your machine is tuned properly, it will not backfire. It will fit your stock header.
Rick
Q: Is the spark arrestor and quiet core combined? I want maximum sound and flow with the spark arrestor in! I have seen some FMF that the spark arrestor is part of a size and sound restriction and I do not want that. I want the sound loud with arrestor in
1 year ago
Paul
Top 10
1 year ago
A: The FMF Powercore 4 HEX Slip-On Exhaust includes the Spark Arrestor. The Spark Arrestor is removable.
The only way to achieve maximum sound and flow is to remove the spark arrestor.
1 - 10 of 28
Fitment

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# Part Numbers
Product Variant Manufacturer Part #
FMF Powercore 4 HEX Slip-On Exhaust 043342
FMF Powercore 4 HEX Slip-On Exhaust 041489
FMF Powercore 4 HEX Slip-On Exhaust 041487
FMF Powercore 4 HEX Slip-On Exhaust 041488
FMF Powercore 4 HEX Slip-On Exhaust 043333
FMF Powercore 4 HEX Slip-On Exhaust 043334
FMF Powercore 4 HEX Slip-On Exhaust 044395
FMF Powercore 4 HEX Slip-On Exhaust 044396
FMF Powercore 4 HEX Slip-On Exhaust 044397
FMF Powercore 4 HEX Slip-On Exhaust 045553
FMF Powercore 4 HEX Slip-On Exhaust 044423
FMF Powercore 4 HEX Slip-On Exhaust 043335
FMF Powercore 4 HEX Slip-On Exhaust 044404
FMF Powercore 4 HEX Slip-On Exhaust 041514
FMF Powercore 4 HEX Slip-On Exhaust 045589
FMF Powercore 4 HEX Slip-On Exhaust 042308
FMF Powercore 4 HEX Slip-On Exhaust 042309
FMF Powercore 4 HEX Slip-On Exhaust 042310
FMF Powercore 4 HEX Slip-On Exhaust 042327
FMF Powercore 4 HEX Slip-On Exhaust 044434
FMF Powercore 4 HEX Slip-On Exhaust 045562
FMF Powercore 4 HEX Slip-On Exhaust 042345
FMF Powercore 4 HEX Slip-On Exhaust 043360
FMF Powercore 4 HEX Slip-On Exhaust 041567
FMF Powercore 4 HEX Slip-On Exhaust 041569
FMF Powercore 4 HEX Slip-On Exhaust 042340
FMF Powercore 4 HEX Slip-On Exhaust 043362
FMF Powercore 4 HEX Slip-On Exhaust 044441
FMF Powercore 4 HEX Slip-On Exhaust 042367
FMF Powercore 4 HEX Slip-On Exhaust 044451
FMF Powercore 4 HEX Slip-On Exhaust 043370
FMF Powercore 4 HEX Slip-On Exhaust 045626
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.