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FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header

$539.98 - $611.98
11% Off - Save up to $70.00

Item #FMF00EZ

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3 Reviews
5 out of 5 stars
5 Star   3 4 Star   0 3 Star   0 2 Star   0 1 Star   0
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All Reviews
new york,ny
Awesome

This exhaust adds some good power low and mid sound excellent

Verified Purchaser
Houston, tx
Breathe Baby!

Along with rejetting, opening up the air box and a stage1 cam my new FMF power bomb exhaust made my crf250x a completely different bike...Love it!

Top 500 Contributor
Twin Falls Id
Spendy but worth it

thisisi the most expensive aftermarket piece I ahve personally bought. So I was skeptical at first, but just adding the pipe, it cleaned up the power delivery, and added some much needed ponies.

18 Questions
Answered:   17
Not Yet:   1
1619
Q: Will this pipe have a deep tone to it
1 month 10 days ago
DaveGearhead
Top 10
1 month 10 days ago
A: It would be similar to the tone from your OEM pipe, only louder.
Hondaforlife
Q: Will this fit my 2017 Crf150r
Over 6 months ago
DaveGearhead
Top 10 Contributor
Over 6 months ago
A: Yes. There is a fitment for your bike.
rider
Q: Hi would this FMF factory 4.1 fit a crf150f. If so how much power will get?
Over 8 months ago
David
Top 10 Contributor
Over 8 months ago
A: This will fit '07-'18 CRF150F. Power will vary based on how you tune your bike.
seth
Q: Will it fit my honda crf150r, also what would improve if i got BOTH the slip on and the pipe
Over 11 months ago
Motoexpert
Top 25
Over 11 months ago
A: You would need to put your bike make model and year into the fitment to make sure it would fit. I show we do carry ones that fit certain years of the 150r. The benefit to a full exhaust system really allows the motor to breath and operate at full capacity without typical oem restrictions due to smog ratings and dot standards. There could possible be small jetting requirements done after installation.
jimbo
Q: Exhaust outlet diameter
1 year 9 months ago
Hi can you tell me the exhaust outlet diameter at spark arrestor?
Jared
Q: For a 07 crf150rb do I have to rejet my carb? If so what type of jets?
2 years 3 months ago
MotoSportExpert
MotoSport Staff Expert
2 years 3 months ago
A: There is not a specific setting I could give you for jetting your bike. It would really depend on your location (altitude/temperature) and how your bike is running with the current jetting. Jetting can be very tricky, there isn't one setting that will work everywhere with every bike. I would recommend taking your bike to a local motorcycle dealership’s service department to have your bike properly jetted.
DDAY
Q: FMF FULL SYSTEM FOR A 2014 KTM 690 ENDURO R
2 years 7 months ago
FULL MUFFLER SUSTEM FOR 2014 KTM 690 ENDURO R PLEASE GIVE ME PART # AND PRICE
MotoSportExpert
MotoSport Staff Expert
2 years 7 months ago
A: Unfortunately FMF does not offer the Full system for your 2014 KTM 690 ENDURO R. Slip-on only
kyle
Q: What carb jets would i have to use if i install this exhaust?
2 years 7 months ago
MotoSportExpert
MotoSport Staff Expert
2 years 7 months ago
A: We know how difficult jetting can be sometimes, that's why when we test our exhausts we also adjust the jetting to see what works best. Sometimes stock jetting works fine, other times a slight adjustment is needed. Here is what we've come up for in our area and is a great starting point for you as well.

We developed these specs with a 32:1 fuel to oil mixing ratio of a 50/50 mix of race fuel and super unleaded, 0 - 1500 ft altitude at 70 degrees outside temperature.

Please note: There are way too many variables in jetting to give you a recommendation that works perfect. Use these specs for a reference to help aid you with your specific bike.
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Jetting Results

Main Jet
160

Pilot Jet
42

Needle
STOCK

Needle Position
3RD

Power Jet
N/A

Air Screw
N/A

Fuel Screw
2
luke
Q: Im looking for something to make my 09 yz450 sound really mean. will this do that?
Over 3 years ago
MotoSportExpert
MotoSport Staff Expert
Over 3 years ago
A: The FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header will definitely give your 2009 Yamaha YZ450F a different (meaner. subject to opinion) sound.
Nick
Q: I have a 2014 kfx450r witch has dfi (digital fuel injection) after installing this, would I need to get some type of power commander?
Over 3 years ago
MotoSportExpert
Expert MotoSport Staff
Over 3 years ago
A: For maximum performance a programmer is recommended.
1 - 10 of 18
Fitment
See all bikes that this part fits...
See Fitments
# Part Numbers
Exhaust
Product Variant Manufacturer Part #
Natural Titanium With Stainless Steel Mid Pipe 041157
Natural Titanium With Stainless Steel Mid Pipe 044206
Blue Anodized Titanium With Titanium Mid Pipe 041291
Natural Titanium With Stainless Steel Mid Pipe 044211
Natural Titanium With Stainless Steel Mid Pipe 042101
Natural Titanium With Stainless Steel Mid Pipe 042061
Natural Titanium With Stainless Steel Mid Pipe 041171
Blue Anodized Titanium With Stainless Steel Mid Pipe 044235
Header
Product Variant Manufacturer Part #
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 042037
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044176
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 042094
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 042131
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 040073
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044225
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 041282
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044244
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044314
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 041118
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044432
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 041133
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044033
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 041082
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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.