FMF Powercore 4 Slip-On Exhaust - 4-Stroke

FMF Powercore 4 Slip-On Exhaust - 4-Stroke
FMF Powercore 4 Slip-On Exhaust - 4-Stroke

$179.99 - $296.99
15% Off - Save up to $53.00

Select your bike to see if this exhaust fits
Description See Also: 64 Reviews 155 Questions Fitment
Item #FMF001B

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64 Reviews
4.9 out of 5 stars
5 Star   75 4 Star   9 3 Star   0 2 Star   0 1 Star   0
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All Reviews
Brad MotoSport Staff Expert
Portland, OR, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Just what I needed

This exhaust really woke up my bike. paired it with the powerbomb headed and the difference is night and day.

ROBBIE Verified Purchaser
Yelm, WA, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
The best aftermarket pipe out there

I can not say enough good things about this pipe. It have me more power way better sound. Very easy to install and is totally awesome.

Homes
Chandler, AZ, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 4/5
Great Value

This product was as advertised. Easy install, looks and sounds great. Noticeable power increase. Fast delivery. I recommend it!

Liana
New Jersey, USA
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Powercore 4 on klx250s

This pipe is great! It made such a big difference in sound and power compared to the stock pipe on my klx250s. I love it.

PatDel Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 3/5 Style 5/5
Powercore 4 on a kfx 450r

This pipe was simple to install, looks good and has a nice sound to it. It's not too loud and it gives a good look to the bike. I didn't notice much of a difference in power between the stock muffler though, but it is just a slip on. Would recommend to someone who wants a pipe that looks good and that is NOT too loud and at a decent price

FMF Powercore 4 Slip-On Exhaust - 4-Stroke
Rick Verified Purchaser
Louisiana, USA
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Awesome performance and sound!

Bought this slipon for my daughters canam ds 90. The sound and performance exceeded my expectations on such a small atv. My daughter smiles from ear to ear every time she rides! Would definitely recommend this exhaust.

Voorhees Verified Purchaser
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 4/5
Louder is safer

Installed on a 2015 xt250 with k&n air and dynojet programmer. Louder than stock but not annoying. 10 min install. With all 3 items I can go 10mph faster with more responsive throttle. Arrived early. Gotta love MotoSport.

Davis18 Verified Purchaser
Augusta, GA, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 4/5 Style 4/5
FMF Powercore 4 Slip-On Exhaust - 4-Stroke

Sounds great not to loud very easy to install on 150R

Buckrub Verified Purchaser
Durability 4/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
Great

Nice , easy slip on pipe

jjameson68
Austin, TX, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
For my '08 yz250f

Love this pipe! I folded my stock one in half on a crash and this one ads all the power I need. Coming out of corners is much smoother and keeping those high RPMs in whoops are great with this slip on. Easily ads a few noticeable HP. Took all of 2 minutes to install.

brmwvu919 Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great Sound

The pipe has some gnarly sound and improved my bottom end acceleration. Will buy the header soon to complete the exhaust system on my '06 CRF450r

Bubba
Gray, GA, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 4/5 Style 4/5
GREAT BUY

I put this on my 2015 TTR230 and couldn't be happier. Super easy installation. Gave the bike more power. Sounds great. This pipe is LOUD!

FMF Powercore 4 Slip-On Exhaust - 4-Stroke
Brmwvu919
Lebanon nj
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Crf450

Looks and sounds great what else can I say. Will buy the header very soon to complete the exhaust.

mikey Verified Purchaser
Hemet, CA, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Power pipe

I noticed the power right away, after I tuned my carb a half turn

Mitch
Fulton,
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
FMF Powercore 4

Very easy installation . Quickest bolt on application to give a noticeable gain in torque and a smoother power curve to give it that low end pull. Can't go wrong with flying machine factory!

jessem
Paris, MO 65275, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Sounds great

Sound great easy to put in gave me a little bit more power

Kells Verified Purchaser
Murphysboro, IL 62966, USA
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
Amazing Product

This slip on is awesome. Gave quite a bit more horsepower and torque in the higher rpms. Durable as well. I love it. When installing it, it didn't exactly "slip-on" but it went on pretty easy. Just had to wiggle it to get it to slide on. I got it because I was wanting to get something aftermarket like the exhaust, plus I was tired of looking at my ridiculously long stock exhaust. Glad I got it!

English
Fuquay Varina, NC, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Sound

This dirt bike exhaust is just throaty as it can get and it comes with a installed spark arrestor so you can hit the trails with it, i have noticed some really big differences, it seems more responsive like it has the power to do anything, with that stock exhaust the crf has sounds like a baby with this monster on it its like a monster. its not to expensive either so it wont break your budget and its definitely worth the money too.

Shep450 Verified Purchaser
Ohio
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 4/5
Suz 450

Awesome exhaust!! Easy to install and sounds great!!

russ Verified Purchaser
Perry, KS 66073, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 4/5 Style 5/5
More power to ya

made my 2008 wr250f sound and run like a dirt bike should had to change the main jet up to a 172 and a couple other small things but it runs a lot better than it did before.

See 20 More Reviews
155 Questions
Answered:   153
Not Yet:   2
Micah
Q: Which FMF pipe would be loudest on a 02 Honda trx400ex?
10 days 6 hours ago
Albert
Location: Washington, USA
Q: When will this exhaust be back in stock? And it will for sure fit a 2003 ktm 450 sx-4stroke?
11 days ago
Kevin
Q: Will it fit my 08 yamaha ttr230. And will it negatively affect the motor in any wat?
16 days ago
MotoSportExpert
MotoSport Staff Expert
15 days ago
A: Yes it will fit your 2008 Yamaha TTR230. Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct exhaust for your bike. No there would not be any negative affects to the motor. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Tyler93
Q: Will I have to rejet my 08 yz 250f?
23 days ago
MotoSportExpert
Expert MotoSport Staff
22 days ago
A: You should always properly tune your bike after getting an aftermarket exhaust to allow it to run at its optimal level and give you the most performance. Failure to properly tune your bike will void your warranty. However, normally when installing just a slip-on only minor jetting changes are needed, if any at all. If your bike is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there if necessary.
Matt
Q: Will I have to rejet my 2003 Ltz 400 if its stock?
1 month 1 day ago
MotoSportExpert
MotoSport Staff Expert
1 month ago
A: Yes. You should always properly tune your bike after getting an aftermarket exhaust to allow it to run at its optimal level and give you the most performance. Failure to properly tune your bike will void your warranty.
Due to the variations that may come into effect when tuning an engine (i.e. pipes, intake, altitude, cams, displacement, standard or high compression pistons, etc.) we CANNOT offer jetting recommendations.
Ubbe
Q: Does it fit ?
2 months 10 days ago
Hey guys. I wonder if this exhaust will fit my Kawasaki KLX/dtracker 125 cc. Thanks for answer
MotoSportExpert
Expert MotoSport Staff
2 months 10 days ago
A: Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct exhaust for your bike. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Dave
Location: Ca
Q: Does it come with spark arrestor?
2 months 17 days ago
MotoSportExpert
MotoSport Staff Expert
2 months 17 days ago
A: The FMF Powercore 4 Slip-On Exhaust Includes a removable (most models) spark arrestor.
Shawn
Q: Is there a spark arrestor?
2 months 22 days ago
i was wondering if i have to purchase a different tip to be legal on the tails
Davis18
2 months 17 days ago
A: Yes, there is a spark arrestor.
Homes
2 months 17 days ago Location: Chandler AZ
A: This slip on exhaust comes with a USFS approved spark arrestor. You do not need to purchase one. Slip it on and hit the trials.
Jason
Q: Do I need to rejett for an 07 trx250ex, or need any other accessories?
3 months 26 days ago
MotoSportExpert
Expert MotoSport Staff
3 months 1 day ago
A: Normally when installing a slip-on only minor jetting changes are needed, if any at all. If your bike is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there if necessary.
Johnny
Q: Is this pipe exactly the same in the picture?
Over 5 months ago
Is this pipe exactly the same in the picture if i'll purchase it for my 2015 Kawasaki KLX140L? Does it have a fmf header for my 2015 KLX140L?
MotoSportExpert
MotoSport Staff Expert
Over 5 months ago
A: The image is a generic image supplied by the manufacturer for reference only. It may not be displaying the exact part for your bike. Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct exhaust for your bike. This would be for the slip-on muffler only. Does not include the head pipe. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
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