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: 65 Reviews 160 Questions Fitment
Item #FMF001B

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65 Reviews
4.9 out of 5 stars
5 Star   76 4 Star   9 3 Star   0 2 Star   0 1 Star   0
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All Reviews
Shane Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome

I got this on recommendation from a friend who got the same one last year for his track bike. Mine is a WR250F install was a breeze and it sounds great always love FMF.

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 Top 1000 Contributor
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!!

See 20 More Reviews
160 Questions
Answered:   157
Not Yet:   3
Blake
Q: Will this exact exhuast fit a 2005 honda crf450r?
14 days ago
MotoSportExpert
MotoSport Staff Expert
14 days ago
A: Yes, 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. (The image is a generic image supplied by the manufacturer for reference only. It may not be displaying the exact muffler for your bike).
Brewtrue
Q: When will there be more in stock?
14 days ago
MotoSportExpert
Expert MotoSport Staff
14 days ago
A: Please call one of our sales professionals to inquire about availability.
Dirt Bike / ATV: 1-888-676-8853
Eric
Location: Pikeville, NC 27863, USA
Q: 2007 Suzuki DRZ250 fit?
22 days ago
Can you confirm that this will fit a 2007 DRZ250? The FMF website only goes up to year 2006 and does not show any other exhaust for the 2007 model DRZ250.
Mase
Location: New Jer
Q: I have a 2001 YZ250F and want to know what header pipe I should be using with this exhaust.?
24 days ago
MotoSportExpert
MotoSport Staff Expert
24 days ago
A: The FMF slip on is designed to fit either and FMF or stock header.
RMZ450
Q: Will this fit a 06 RMZ450, is it easy to install on stock system?
28 days ago
MotoSportExpert
Expert MotoSport Staff
26 days ago
A: Yes. Installation of a slip-on is very easy. 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.
Micah
Q: Which FMF pipe would be loudest on a 02 Honda trx400ex?
1 month 12 days 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?
1 month 14 days ago
Kevin
Q: Will it fit my 08 yamaha ttr230. And will it negatively affect the motor in any wat?
1 month 18 days ago
MotoSportExpert
MotoSport Staff Expert
1 month 18 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?
1 month 25 days ago
MotoSportExpert
Expert MotoSport Staff
1 month 25 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?
2 months 3 days ago
MotoSportExpert
MotoSport Staff Expert
2 months 2 days 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.
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