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

$539.98 - $674.98
10% Off - Save up to $60.00

Description See Also: 2 Reviews 14 Questions Fitment Part Numbers
Item #FMF00EZ

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2 Reviews
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All Reviews
Russman 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!

crfracer74 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.

14 Questions
Answered:   13
Not Yet:   1
jimbo
Q: Exhaust outlet diameter?
Over 5 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?
Over 12 months ago
MotoSportExpert
Expert MotoSport Staff
Over 12 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?
1 year 3 months ago
FULL MUFFLER SUSTEM FOR 2014 KTM 690 ENDURO R PLEASE GIVE ME PART # AND PRICE
MotoSportExpert
MotoSport Staff Expert
1 year 2 months ago
A: Unfortunately FMF does not offer the Full system for your 2014 KTM 690 ENDURO R. Slip-on only
kyle
Location: illinois
Q: What carb jets would i have to use if i install this exhaust?
1 year 3 months ago
MotoSportExpert
Expert MotoSport Staff
1 year 3 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.
Make Your Selections

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?
1 year 8 months ago
MotoSportExpert
MotoSport Staff Expert
1 year 8 months 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?
1 year 8 months ago
MotoSportExpert
Expert MotoSport Staff
1 year 8 months ago
A: For maximum performance a programmer is recommended.
Jose
Location: Pasco, WA, USA
Q: I want to buy a complete system for my wr 450f escpe but do not want the long end as the original wr, if not one that leaves only the tip, as this is?
1 year 8 months ago
MotoSportExpert
MotoSport Staff Expert
1 year 8 months ago
A: The FMF Factory 4.1 Complete Exhaust would be shorter than the stock muffler on your 2009 Yamaha WR450F.
Marshall1234
Location: Macon, MO 63552, USA
Q: Will this system fit my 2005 YZ250F?
2 years ago
MotoSportExpert
Expert MotoSport Staff
2 years 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.
Revs
Q: Have a 2014 LTZ400Z...would I need to add an EFI.?
2 years 5 months ago
MotoSportExpert
Expert MotoSport Staff
2 years 5 months ago
A: Yes, when installing an aftermarket exhaust on EFI models
it will need to be programmed.
justin
Location: pa
Q: What would happen if i didnt jet my bike. also how much more low end does powerbomb give u?
2 years 8 months ago
MotoSportExpert
Top 50 Contributor Top 1 Contributor
2 years 7 months 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.

For power gains from installing an exhaust product, that varies with the machine, modifications and the tune of the carburetor. Expect at least to shift where the power is delivered during the RPM range and do not expect PEAK HP gains.
1-10 of 14
Fitment
See all bikes that this part fits...
See Fitments
# Part Numbers
Exhaust
Product Variant Manufacturer Part #
Blue Anodized Titanium With Titanium Mid Pipe 041291
Blue Anodized Titanium With Stainless Steel Mid Pipe 044235
Natural Titanium With Stainless Steel Mid Pipe 044211
Natural Titanium With Stainless Steel Mid Pipe 041157
Natural Titanium With Stainless Steel Mid Pipe 043128
Natural Titanium With Stainless Steel Mid Pipe 041171
Natural Titanium With Stainless Steel Mid Pipe 042101
Natural Titanium With Stainless Steel Mid Pipe 045229
Natural Titanium With Titanium Mid Pipe 041214
Natural Titanium With Stainless Steel Mid Pipe 042061
Natural Titanium With Stainless Steel Mid Pipe 044203
Natural Titanium With Stainless Steel Mid Pipe 044206
Blue Anodized Titanium With Stainless Steel Mid Pipe 041289
Header
Product Variant Manufacturer Part #
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 044176
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 042094
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 043209
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 041220
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 041133
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044106
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 041082
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 042037
Stainless Steel 045225
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 041282
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 041118
FMF Factory 4.1 Complete Exhaust - Stainless Steel Mid Pipe With Powerbomb Header 044033
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