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FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header - Race

Retail: $179.99
$164.99 - $169.99
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FMF Powercore 4 Complete Exhaust With Stainless Hi-Flo Header - Race

Product Description

The Mini Powercore 4 is the best bang-for-your-buck performance bolt-on for your mini. Offered as a standard Mini Powercore 4, Closed Course Big Bore System or as a Spark Arrestor Version, the Mini Powercore 4 features a Hi-Flo stainless steel core and formed end caps, an aircraft-grade aluminum canister and a durable stainless steel header. It's pounds lighter than stock and you will swear the motor has been bored and stroked with the first twist of the throttle.

  • Hi-Flo core and end cap.
  • Pounds lighter than stock.
  • No spark arrestor.

Detailed Specifications:

  • Type: System.
  • Header construction: Stainless steel.
  • Header type: Hi-Flo.
  • Weight: 3.5 pounds.

Note: For closed course competition use only. Not intended for street use.

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4.6 out of 5 stars
5 star   18
4 star   6
3 star 0
2 star   1
1 star 0
Crash311 Location: Palm beach Florida
1-10 of 25
Verified Purchaser
Great pipe makes a big difference in power bands g

Slapped this pipe on a little bike and it made a huge difference in the power it was making even manages to do some good wheelies with me on it and i weigh about 190. Sounds like a big bike now.

Verified Purchaser
Great buy!

I put it on my sons 2002 xr100 and it sounds great! It took only like 10 mins to put on just un Bolt and re bolt back on! Great price and overall great buy!


really easy to install and sounds awesome! installed on a 2005 DRZ 110. Only downside is no spark arrestor...we ride trails as well as track. It's a easy install to swap from stock to FMF. Didn't do any jetting.

Location: Ben Lomond, CA

The pipe bolted right on no mods, Will need to use stock "burn guard". sounds and runs great. 2002 KLX110

Location: Palm beach Florida
My kid loved it

Sounds B A happy with pipe fit perfictly

Location: Menifee, CA
Best pipe overall

I just received this pipe from motosport and put it on right away I started it up it sounded like a totally different bike I went down the street from my house where there is a dirt lot with a bunch of jumps and I noticed a difference right away other people where there and where video taping me and asked me what kind of bike it was (klx 110) and I told them they said it doesn't even sound like a klx 110! Great pipe!

Location: Brookhaven, MS
Get what you pay for.

I was shocked to find a full exhaust for my sons CRF80 for under $200. It fit but only becuase I had the tools to remove and reweld 2 of the threaded mounting points. Fit and finIsh were disappointing but then again this is probably "the bottom" as far as price point on a dull exhaust. I would buy again.

Ease of Installation
Location: Shawano, WI
Big Power Increase!

This exhaust is awsome I had it on for a week now and it has amazed me. This was Deffinatly a good buy! I have a 2006 Honda CRF100F and it made it alot more powerful! Plus i started running 93 octane fuel thru it and that topped it off. If you are looking for a rise in power without spending to much money this is the key!

Ease of Installation
Top 1000 Contributor
Location: Rapid City, SD

FMF......enough said! Great exhaust and noticeable power difference from stock.

Ease of Installation
Location: Montrose, CO
Nice Product

Started out by putting a FMF Power Bomb header on my '06 CRF 450 but I didn't notice much difference at all. Followed up by putting on a full FMF Power Core 4 exhaust on. It mounted easily. It made a very noticable increase in power, much more so then the FMF header did. More significant of power increase when in the lower RPM's if the spark arrestor is out. Louder then stock but not to bad. It's holding up good except for the decals having a tendency to peel back.

1-10 of 25
Total Questions (53)
Questions with answers:
Questions without answers:
dennis Location: upland
Jason Location: Mays Landing, Hamilton Township, NJ 08330, USA
1-10 of 53
John 7 days 23 hours ago
Does this exhaust come with new mounting hardware?
Expert MotoSport Staff
7 days 20 hours ago Location: Portland, OR, USA
You would actually need to reuse the stock hardware from your OEM exhaust to mount this exhaust system on your TTR125.
Xr80boy 10 days 8 hours ago Location: Washington
Fmf exhaust power core 4. 4 stroke race?
If a in side track exhaust is used for street use will it hurt it???
MotoSport Staff Expert
9 days 14 hours ago Location: Portland, OR, USA
It will not hurt the bike. This exhaust is just not street legal. It is intended for closed course competition use only.
dennis 14 days ago Location: upland
does this pipe come with a heat pipe protector shield ? holes in it or just smooth?
Expert MotoSport Staff
13 days ago Location: Portland, OR, USA
No. This exhaust system would not come with a heat shield and would not have mounts for the stock heat shield to mount to. FMF does make a heat shield that could be used on this exhaust system. You can find the FMF heat shield here:
Jason 16 days ago Location: Mays Landing, Hamilton Township, NJ 08330, USA
Would this exhaust fit my bike?
hi i have a 2012 yamaha tt-r125le and i have noticed that the stock exhaust is on the left side of the bike, most other bikes have it on the right side. Would this fit my bike.
MotoSport Staff Expert
15 days ago Location: Portland, OR, USA
Yes, This would fit your Yamaha TTR125. The FMF Exhaust for your bike would route out the left side of the bike just like the stock exhaust. Please note: 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.
lexi 1 month 7 days ago
Do you Need a Spark Arrestor?
I Have A 2004 TTR125 and was looking to get this exhaust, but whats the difference with the spark arrestor is it important to have or will i be ok without it ? and is it better to have the spark arrestor ?
Expert MotoSport Staff
1 month 6 days ago Location: Portland, OR, USA
This is the "race" system so it would not have a spark arrestor. There is a FMF Powercore 4 Complete Exhaust With Spark Arrestor that is basically this same exhaust but with a spark arrestor. Here is a link to the exhaust system with the spark arrestor:
yamaharider310 3 months 2 days ago
Would i need to re-jet my carb and if so does it come with them?
MotoSport Staff Expert
3 months 2 days ago Location: Portland, OR, USA
Normally you will need to re-jet your bike slightly when switching over to a full aftermarket exhaust. It really depends on if the bike is currently jetted properly and how the bike runs with the exhaust installed. The jets are not included with the exhaust system.
James 4 months 25 days ago
Does the exhaust also fit an xr125?
MotoSport Staff
4 months 23 days ago Location: Portland, OR, USA
Unfortunately, this exhaust does not have a fitment for the XR125l models.
beagleboy Over 5 months ago Location: Georgia, USA
Is this direct bolt on for a 2007 Honda CFR100F?
MotoSport Staff
Over 5 months ago Location: Portland, OR, USA
Yes, this pipe is available for the 2007 CRF100F. It will be a direct bolt on using the stock mounting hardware. After installation, the carburetor may require jetting but that will really depend on your location/elevation and how the bike actually runs with the new exhaust installed. Typically the bike will run a lean and require richer jetting but that does vary based on the previously mentioned factors. Make sure to profile your bike correctly when ordering as the exhausts are model specific.
USMarinef23 Over 6 months ago Location: MN
Have fast can this make my 125 TTRL go?
MotoSport Staff
Over 6 months ago Location: Portland, OR, USA
This will slightly increase the power output of the TT-R125l. It will un-restrict the exhaust compared to the stock system and allow the bike to rev freer. Unfortunately with just an exhaust, it wont make huge difference, but with the proper jetting the bike will run a little harder.
Tony Over 6 months ago
Jetting - what jet should I use with this exhaust?
2094 TTR 125LE - what jetting should I use with this exhaust? Also, does this have a spark arrestor?
MotoSport Staff
Over 6 months ago Location: Portland, OR, USA
This exhaust does not have a spark arrestor. We do have this exhaust available in a spark arrested version for your 2004 TT-R125 though. As for jetting, it will vary based on your location/elevation. If you contact FMF directly and provide your location to them, they can assist with getting you the proper jetting. FMF can be reached at (310) 631-4363.
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