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FMF Fatty Pipe - 2-Stroke
FMF Fatty Pipe - 2-Stroke

$197.99 - $359.99
10% Off - Save up to $40.00

Item #FMF001X

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162 Reviews
4.7 out of 5 stars
5 Star   133 4 Star   21 3 Star   3 2 Star   2 1 Star   3
All Reviews
JB300
1 month 13 days ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
For 17 Ktm 300xcw

Awesome pipe, slightly lighter than oem pipe, mimics oem pipe power delivery but a little more everywhere especially up top and pulls harder, longer.

Alex Verified Purchaser
1 month 15 days ago Bay Area
Durability5/5Ease of Installation5/5Performance4/5Power4/5Style5/5
Perfect fit

Easy! Perfect fit.

Tomtom Verified Purchaser
1 month 25 days ago Washington
Durability4/5Ease of Installation2/5Performance5/5Power5/5Style5/5
Nice fitting pipe

Very nice looking, the fit was a tight one but it will make it

My name Jef Verified Purchaser
2 months 23 days ago Fresno
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Fit perfect

Fit perfect. If you don't have a spring puller, I suggest using vice grips for the springs.

Kx_nick
3 months 2 days ago Huntington Station New york
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
2018 Yz125

Pipe looks sounds and performs awesome! A little rust inside the chamber but thats not the reason for 4 stars. The pipe has 2 mounting points. 1 point does not have threading so it is only held on by one bolt and the springs. Other than that its great paired with a pro circuit r304 shorty!

Power Curve mx Top 100 Verified Purchaser
3 months 7 days ago Nj
Durability4/5Ease of Installation5/5Performance4/5Power4/5Style5/5
Finish is awesome!

Great look & this pipe fits great and has awesome power gains

jern Verified Purchaser
3 months 10 days ago Illinois
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
FMF FATTY

Bought this got it it's perfect no scratchs or dents have yet to put on

southard Verified Purchaser
3 months 16 days ago cedar lake IN
Durability4/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Fmf fatty!!

Wow BRAP full on power and looks sick!! Love FMF great price and quality

PWAHN Verified Purchaser
3 months 17 days ago
Durability4/5Ease of Installation4/5Performance4/5Power4/5Style4/5
Good product

After installing this I noticed my biggest power gains on middle to lower end. Gives my bike more of a ping sound.

Timothy Verified Purchaser
3 months 26 days ago Phoenix az
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
FMF and Moto sport killer combo

Awesome pipe and silencer and it got delivered fast Moto sport is great I will always get my parts from them

See 10 More Reviews
104 Questions
Answered:   96
Not Yet:   8
Sraver
Q: Does this come with exhaust springs? Do I need them for A 2008 KTM105? 
1 month 16 days ago
Austin
Q: Will this pipe fit my 1986 yz 490
2 months 15 days ago
DaveGearhead
Top 1
2 months 15 days ago
A: Yes. Enter the year, make, and model of your machine into our website to ensure proper fitment.
Ashton
Q: I have a 86lt250r motor on a 87 frame will this exhaust sit flush on the frame and line up even or would I have to make modifications 
2 months 18 days ago
Michael
Top 10
2 months 18 days ago
A: You will not be able to use this on your vehicle.
Ethantaylor56
Q: Is there supposed to be a dent in the fatty pipe on the back side
3 months 12 days ago
Chowe
Top 25
3 months 12 days ago
A: Yes generally speaking a clearance dent is normal to have no matter if you are purchasing a FMF, Pro Circuit, or Bills pipe. If you have any questions or concerns give us a call at 1-888-676-8853
Dean the green been
Q: Would this pipe fit a 2001 yz125.
Over 5 months ago
Blazer
Q: Is the shape of the pipe close to the stock shape of my 2018 KTM 150xcw's pipe. Wondering if my pipe guard would swap over. Also if i bought the shorty slip on would it fit
Over 9 months ago
DaveGearhead
Top 1
Over 9 months ago
A: Your OEM guard is not likely to fit on any aftermarket header, and yes, the shorty muffler will work for you.
Donnys13
Q: Will this fit a fmf isde on a 99 cr250
Over 9 months ago
Paul
Top 10
Over 9 months ago
A: The FMF Fatty Pipe for the 1999 CR250 has the same dimensions at each end as the original Honda pipe, so that it will accept either the original Honda silencer or an FMF Silencer.
If your FMF ISDE silencer fits your Honda pipe, then the FMF Fatty Pipe will fit your FMF ISDE silencer .
Jamie
Q: What is the difference between the Factory Fatty and the plain Fatty pipe ?? My daughter has a 2006 105sx I have installed an aftermarket CDI ignition module and a FMF silencer with spark arrestor muffler and also a 13T front sprocket the top end was also
Over 10 months ago
Dan Gearhead
Top 25
Over 10 months ago
A: The Factory Fatty is a "factory" style race pipe, it is made of thinner gauge steel to save weight and is not nickle-coated like the regular Fatty.
Preston
Q: Will this fit with a fmf shorty?
Over 11 months ago
TiaGearhead
Top 25
Over 11 months ago
A: Yes all FMF slip ons and pipes are interchangeable
Christian Lee
Q: Will this product fit a 1986 Yamaha 490 YZ like the stock one?
Over 11 months ago
JamesGearhead
Top 10
Over 11 months ago
A: This will fit on without any additional mounting hardware. However the style of the pipe will look different than the original OEM pipe looked.
1 - 10 of 104
Fitment

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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
FMF Fatty Pipe - 2-Stroke 020375
FMF Fatty Pipe - 2-Stroke 021036
FMF Fatty Pipe - 2-Stroke 021048
FMF Fatty Pipe - 2-Stroke 021021
FMF Fatty Pipe - 2-Stroke 020378
FMF Fatty Pipe - 2-Stroke 020020
FMF Fatty Pipe - 2-Stroke 021006
FMF Fatty Pipe - 2-Stroke 021040
FMF Fatty Pipe - 2-Stroke 021052
FMF Fatty Pipe - 2-Stroke 021000
FMF Fatty Pipe - 2-Stroke 021031
FMF Fatty Pipe - 2-Stroke 021044
FMF Fatty Pipe - 2-Stroke 023049
FMF Fatty Pipe - 2-Stroke 025073
FMF Fatty Pipe - 2-Stroke 025119
FMF Fatty Pipe - 2-Stroke 025130
FMF Fatty Pipe - 2-Stroke 025069
FMF Fatty Pipe - 2-Stroke 025006
FMF Fatty Pipe - 2-Stroke 025060
FMF Fatty Pipe - 2-Stroke 025091
FMF Fatty Pipe - 2-Stroke 025088
FMF Fatty Pipe - 2-Stroke 020050
FMF Fatty Pipe - 2-Stroke 022048
FMF Fatty Pipe - 2-Stroke 022003
FMF Fatty Pipe - 2-Stroke 020054
FMF Fatty Pipe - 2-Stroke 022015
FMF Fatty Pipe - 2-Stroke 022040
FMF Fatty Pipe - 2-Stroke 022052
FMF Fatty Pipe - 2-Stroke 020045
FMF Fatty Pipe - 2-Stroke 022000
FMF Fatty Pipe - 2-Stroke 022060
FMF Fatty Pipe - 2-Stroke 022006
FMF Fatty Pipe - 2-Stroke 022034
FMF Fatty Pipe - 2-Stroke 024023
FMF Fatty Pipe - 2-Stroke 023055
FMF Fatty Pipe - 2-Stroke 020107
FMF Fatty Pipe - 2-Stroke 023006
FMF Fatty Pipe - 2-Stroke 023018
FMF Fatty Pipe - 2-Stroke 023059
FMF Fatty Pipe - 2-Stroke 023000
FMF Fatty Pipe - 2-Stroke 020133
FMF Fatty Pipe - 2-Stroke 024041
FMF Fatty Pipe - 2-Stroke 024049
FMF Fatty Pipe - 2-Stroke 020147
FMF Fatty Pipe - 2-Stroke 024053
FMF Fatty Pipe - 2-Stroke 020149
FMF Fatty Pipe - 2-Stroke 020138
FMF Fatty Pipe - 2-Stroke 024000
FMF Fatty Pipe - 2-Stroke 020006
FMF Fatty Pipe - 2-Stroke 020014
FMF Fatty Pipe - 2-Stroke 020015
FMF Fatty Pipe - 2-Stroke 020017
FMF Fatty Pipe - 2-Stroke 020018
FMF Fatty Pipe - 2-Stroke 020048
FMF Fatty Pipe - 2-Stroke 020034
FMF Fatty Pipe - 2-Stroke 022044
FMF Fatty Pipe - 2-Stroke 020037
FMF Fatty Pipe - 2-Stroke 020039
FMF Fatty Pipe - 2-Stroke 020042
FMF Fatty Pipe - 2-Stroke 022012
FMF Fatty Pipe - 2-Stroke 020124
FMF Fatty Pipe - 2-Stroke 020127
FMF Fatty Pipe - 2-Stroke 020130
FMF Fatty Pipe - 2-Stroke 020143
FMF Fatty Pipe - 2-Stroke 020142
FMF Fatty Pipe - 2-Stroke 020135
FMF Fatty Pipe - 2-Stroke 024034
FMF Fatty Pipe - 2-Stroke 020137
FMF Fatty Pipe - 2-Stroke 020145
FMF Fatty Pipe - 2-Stroke 020150
FMF Fatty Pipe - 2-Stroke 020087
FMF Fatty Pipe - 2-Stroke 023037
FMF Fatty Pipe - 2-Stroke 020088
FMF Fatty Pipe - 2-Stroke 020089
FMF Fatty Pipe - 2-Stroke 020092
FMF Fatty Pipe - 2-Stroke 020104
FMF Fatty Pipe - 2-Stroke 020105
FMF Fatty Pipe - 2-Stroke 020109
FMF Fatty Pipe - 2-Stroke 020390
FMF Fatty Pipe - 2-Stroke 025019
FMF Fatty Pipe - 2-Stroke 025052
FMF Fatty Pipe - 2-Stroke 025040
FMF Fatty Pipe - 2-Stroke 025151
FMF Fatty Pipe - 2-Stroke 021058
FMF Fatty Pipe - 2-Stroke 025092
FMF Fatty Pipe - 2-Stroke 025150
FMF Fatty Pipe - 2-Stroke 025159
FMF Fatty Pipe - 2-Stroke 025182
FMF Fatty Pipe - 2-Stroke 025197
FMF Fatty Pipe - 2-Stroke 025202
FMF Fatty Pipe - 2-Stroke 025221
FMF Fatty Pipe - 2-Stroke 024068
FMF Fatty Pipe - 2-Stroke 024072
FMF Fatty Pipe - 2-Stroke 025238
FMF Fatty Pipe - 2-Stroke 025241
FMF Fatty Pipe - 2-Stroke 025263
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.

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