Warehouse Clearance - Stock Up On Riding Gear & Casual SHOP NOW >
FMF Powercore 4 Complete Exhaust Stainless Hi-Flo Header
FMF Powercore 4 Complete Exhaust Stainless Hi-Flo Header

$233.99 $259.99
10% Off - Save $26.00
4.92 5 12
Rating: 4.9 out of 5 stars

Item #FMF001D

12 Reviews

4.9 out of 5 stars
  •   11 reviews
  •   1 reviews
  •   0 reviews
  •   0 reviews
  •   0 reviews

All Reviews

TXrider

Verified Purchaser
24 days ago Spring, TX
5 out of 5 stars
Great Upgrade

Bought this for a ttr125. Combined with a new carb and more air, the unit definitely added more pep! The best part was the sound - the ttr sounds WAY better with this set up.

Coach

Verified Purchaser
1 year 2 months ago WA
5 out of 5 stars
Sweet sound

Picked this up for my daughters CRF110. Woke the bike up a bit and gives it a sweet exhaust tone, plus looks great with a perfect fit. Stock heat shield bolts right on. Such an easy install!

Men123556

1 year 4 months ago New Hampshire
5 out of 5 stars
Amazing pipe

It’s a great exhaust. Makes the bike sound a lot better than stock and will rumble everything around you. I ride my trails every 2 weeks or so and my neighbors across my neighborhood can here it. I just have one question, what size jet do I need? It’s a 2018 crf125f and running lean

PGApro

Verified Purchaser
1 year 7 months ago Molalla Or
5 out of 5 stars
Perfect addition to the bike

I bought his for my wife’s TTR125 and I her or I couldn’t be happier. Easy to install and changed the tone of the bike without making it obnoxious. Good pipe!

Yamaha0305

Verified Purchaser
Over 3 years ago Millerstown, pa
5 out of 5 stars
Great little exhaust.

The exhaust was a direct fit to our 2003 Ttr 90. Installed in about 15 minutes. The only downfall we found was we needed a different jet for where we live. Increased the performance from the exhaust.

CSMoto

Verified Purchaser
Over 3 years ago Colorado Springs, CO, USA
5 out of 5 stars
Amazing amount of power

Not only does this exhaust system sound nice, it added an amazing amount of power to my son's bike. He has a Yamaha ttr-50 and I wanted to give it a little more power on the hills. Well it accomplished this and more. Added a ton of torque in the low end. He has not gotten stuck on a hill since. Also very easy to install. My 4 year old son practically did it himself, with just a little guidance from me. Highly recommended!

Apolloracer

Verified Purchaser
Over 4 years ago
5 out of 5 stars
Excellent purchase

The product has lived up to it's description. Very happy with it and the delivery came before expected.

Nooch

Verified Purchaser
Over 5 years ago Mountain Home, AR, USA
5 out of 5 stars
Good pipe.

My sons bike is used for both trail riding and racing, so this is a good pipe for both since it has the spark arrester. Easy to put on and the primary heat shield bolted right up.

brian48503

Verified Purchaser
Over 5 years ago Flint, MI, USA
5 out of 5 stars
Fmf power core 4

I ordered the fmf power core 4 for my 02 yamaha ttr125l and fit great and sounds awesome. Definitely recommend motorsport.com to everyone there customer service is hands down helped me with all questions before I ordered thanks a lot

Kidsbike

Verified Purchaser
Over 5 years ago
5 out of 5 stars

17 Questions

  • Answered:   15
  • Not Yet:   1

Question asked by Blazer 2019

Question: Does this new exhaust system come with a heat shield like the factory version has?
Question asked 1 month 16 days ago

Question asked by Jack

Question: Will this fit on my Honda CRF125f big wheel. 
Question asked Over 6 months ago
Question answered by Michael
User's contributor status: Top 10
Question answered Over 6 months ago
Answer: I actually need the year of the Honda as well to determine proper fitment for you.

Question asked by Jake85

Question: My son just bought a klx 110 with the power core 4 already on it. The heat shield is missing. Is this a fmf part or or does the factory shield fit?
Question asked 1 year ago
Question answered by Paul
User's contributor status: Top 10
Question answered 1 year ago
Answer: This FMF Powercore 4 Complete Exhaust Stainless Hi-Flo Header does not fit the KLX110.

To help us to find parts to fit your KLX110, we will need to know the model year, and whether it is the standard model with smaller wheels, or the "L" model with larger wheels.

Question asked by Men123556

Question: Can someone Give me a lesson about jetting? I have a 2018 crf125f and it’s running lean. Does anybody know what size jet I would need to balance it out? Thanks
Question asked 1 year 4 months ago
Question answered by JerryGearhead
User's contributor status: Top 25
Question answered 1 year 4 months ago
Answer: You Should contact JD Jetting their Phone Number is 360-350-0557.

Question asked by Jr22

Question: How loud is fmf on a 4 stroke ?
Question asked 1 year 5 months ago
Question answered by JamesGearhead
User's contributor status: Top 10
Question answered 1 year 5 months ago
Answer: The engine noise will vary depending on the make/model. There are several types of FMF pipes, this is just one of the many.

Question asked by Honda

Question: Will this make my crf125f faster and improve the performance of my bike
Question asked 1 year 6 months ago
Question answered by MattGearhead
User's contributor status: Top 25
Question answered 1 year 6 months ago
Answer: This exhaust will improve the performance of your bike. However, you may need to change the stock jetting to maximize performance.

Question asked by Yamaha

Question: What is louder fmf powercore 4 or pro circuit t4
Question asked 1 year 6 months ago
Question answered by TylerGearhead
User's contributor status: Top 25
Question answered 1 year 6 months ago
Answer: There isn't a decibel level test comparing both exhaust. Both will create a nice thump compared to stock!

Question asked by Boii

Question: My exhaust is on the left but the picture shows it on the right side. Will it work? What is louder fmf or pro circuit?
Question asked 1 year 7 months ago
Question answered by TylerGearhead
User's contributor status: Top 25
Question answered 1 year 7 months ago
Answer: Both exhaust systems are louder than stock. If you profile your specific machine, you will be sent the exhaust that is a direct replacement for your stock exhaust.

Question asked by Joey

Question: My 2018 ttr 125 had the exhaust on the left side but the picture shows it on right. So I don't know if it will work. Also what is louder fmf or pro circuit?
Question asked 1 year 7 months ago
Question answered by TiaGearhead
User's contributor status: Top 25
Question answered 1 year 7 months ago
Answer: The photo is just for reference, this will indeed fit your 2018 TTR125. As far as sound goes its going to depend on which model FMF and Pro Circuit you are comparing.

Question asked by Josh

Question: What size is the header?
Question asked 1 year 11 months ago
Question answered by robert
User's contributor status: Top 10 Contributor
Question answered 1 year 11 months ago
Answer: header sizes and dimensions will depend on the model of bike selected.
1 - 10 of 17

Fitment

See all bikes that this part fits...

# Part Numbers

Product Variant Manufacturer Part #
Aluminum 041502
Aluminum 040071
Aluminum 040011
Aluminum 041179
Aluminum 040070
Aluminum 044157
Aluminum 044273
Aluminum 041534

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.