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

$ 305.99 - $ 314.99
10% Off - Save up to $35.00

Item #FMF000A

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30 Reviews
4.8 out of 5 stars
5 Star   27 4 Star   1 3 Star   1 2 Star   0 1 Star   1
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All Reviews
Verified Purchaser
Power, MT
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
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.

Nj
Durability 5/5 Ease of Installation 1/5 Performance 1/5 Power 1/5 Style 5/5
Don't fit 2017 crf250l rally

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

Midland, Mi
Durability 5/5 Ease of Installation 3/5 Style 5/5
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.

Expert MotoSport Staff Verified Purchaser
Newberg oregon
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Super clean

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

Brockton, MA
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
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.

Verified Purchaser
Paul
Durability 5/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 3/5
Aftermarket

Installed in 10 minutes. Perfect fit. Slightly louder sound, with backfires. Good sound. Same weight as factory muffler...should have bought a more expensive muffler for weight savings. Muffler not in stock so not shipped right away. Called. Listened to 15 minutes of recorded propaganda about how good they are about sticking popular items. Shipped the next day. Slow free shipping.

Ohio
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Incredible

I couldnt get one for a while it is worth every dollar makes it sound almost like a motocross bike its epic

MotoSport Staff Expert
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome upgrade!

I bought this to replace an out dated White Bros. E-series pipe and I cannot believe the difference. Not only in power, but the sound is more crisp and is about half the weight of my old one.

Verified Purchaser
Refugio tX
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome pipe has good sound

I had one before on a 2007 KX liked it then so I bought another one for my 2017 KX450 like it now great pipe I would recommend it to anybody awesome pipe you need to go get one

Atlanta Georgia
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome product!

I bought the exhaust Wednesday night and it was at my door by Friday at quitting time! Very happy with the fast shipping! As far as satisfaction it exceeded my expectations! I put it on my 2018 raptor 700 and it sounds AMAZING! I would definitely buy this product again! And great price as well!

See 10 More Reviews
21 Questions
Answered:   19
Not Yet:   2
Jay80
Q: Will this fit a 2019 KX 250F 
11 days ago
robert
Top 10
11 days ago
A: Their is a correct fit for you bike.
HEAVYD
Q: Does it backfire? and will it fit my stock yz450 2018 header?
27 days ago
Trevor Gearhead
Top 25
27 days 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 month 25 days ago
Paul
Top 10
1 month 25 days 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.
DanB
Q: Which spark arrestor?
Over 9 months ago
just ordered the FMF Powercore 4 HEX, forgot to order the spark arrestor. can anyone tell me which one will fit this exhaust?
robert
Top 10 Contributor
Over 9 months ago
A: The Hex will Include a removable spark arrestor.
Beech434
Q: How loud is this exhaust?
Over 10 months ago
Will it be under 96 decibels?
David
Top 10 Contributor
Over 10 months ago
A: It will be over 96 decibels. You'll need to purchase the FMF quite insert to bring it below 96 decibels.
Mauro
Q: What is the approximate weight
Over 11 months ago
David
Top 10 Contributor
Over 11 months ago
A: Which bike are you putting this on? Weight will vary a little. Weight is roughly around 6-7lbs.
Husqy
Q: Do you sell the quitcore insert for this item?
Over 11 months ago
Where can i find it?
David
Top 10 Contributor
Over 11 months ago
A: I included a link below.

https://www.motosport.com/fmf-powercore-quiet-core-insert
Husqy
Q: Do i need to change mapping crf 250 rally 2017
Over 11 months ago
David
Top 10 Contributor
Over 11 months ago
A: Typically on slip-ons you don't have to but if you want optimal performance I would suggest it.
Nofear32
Q: Does this come with a carbon fiber end cap?
1 year 2 months ago
robert
Top 10 Contributor
1 year 2 months ago
A: No it comes with a stainless steel end cap.
Mikey35
Q: Will this exhaust fit clean onto a stock header for a 2017 raptor 700r?
1 year 9 months ago
Also please let me know if there's anything else that I would need to purchase for a effortless install. Thank you!
1 - 10 of 21
Fitment

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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
FMF Powercore 4 HEX Slip-On Exhaust N/A
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 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 42345
FMF Powercore 4 HEX Slip-On Exhaust 43360
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.