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FMF Factory 4.1 RCT Slip-On Exhaust
FMF Factory 4.1 RCT Slip-On Exhaust

$337.99 - $539.99
10% Off - Save up to $60.00

Item #FMF000P

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51 Reviews
4.9 out of 5 stars
5 Star   49 4 Star   1 3 Star   1 2 Star   0 1 Star   0
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All Reviews
Verified Purchaser
Plymouth. Wi
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome power and sound

Bought for my 2017 Husqvarna fe450 and I had a injection tuner. This thing helps make smooth out the power as well as give it a boost. I dont run the silencer or spark arrestor and it's crazy loud when your full throttle. All in all amazing pipe for the money I've always ran FMF or pro circuit. Would buy again.

Verified Purchaser
Bellingham, WA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Bolted right on and performs very well

I was very impressed with how well the slip on fit. FMF does a great job engineering and building these. There was a very noticeable increase in power and performance of the bike. First week my son raced with it he won his class.

Verified Purchaser
Indiana
Durability 3/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Looks sharp and sounds amazing

Have had the pipe for almost a month bought the full system with the mega bomb header all titanium...sounds amazing you won’t regret

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Perfect!!!!

Amazing exhaust looks great and sounds even better

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Looks good, sounds good, arrests sparks gooder.

Bought this slip-on for my 2016 KTM 350 SX-F, it took minimal tooling to get it on. It made the bike a little peppier, sounds amazing and I can now ride on state and federal land.

Verified Purchaser
Puerto Rico
Durability 3/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Looks nice, sound is great

I'm very happy with the slipon it looks good and it sounds good

Verified Purchaser
Idaho
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome performance!

Opened up the power and even wider on my 18 450FX! So much bottom awesome looks!! I would highly recommend this product to anyone who wants to make their machine even more fun than it already is!!

Verified Purchaser
California
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Well worth the money.

The pipe is pricey,but the looks and sound are awesome. It sounds wicked.Glad I spent the money.

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Fire

Makes it super throaty major horse power gains

Verified Purchaser
Westminster md
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Best exhaust

Best exhaust I have owned. Just wish I could get a replacement carbon fiber tip quicker

See 10 More Reviews
37 Questions
Answered:   35
Not Yet:   2
Kris
Q: Will I need to get the bike tuned if I get this slip on for my 2017 ktm 350 sx-f ?
2 days 23 hours ago
robert
Top 10
2 days 23 hours ago
A: Re-tuning from a slip on is dependent on the make and model but it is always a good idea to check the tune to insure peak power and safety for the engine.
Pablo
Q: Does it fit on Kim 2018 500excf?
12 days ago
DaveGearhead
Top 10
12 days ago
A: Yes. This item will fit on your bike.
jordan9861
Q: Does this fit on a 2018 fe 450
1 month 17 days ago
robert
Top 10
1 month 17 days ago
A: We currently only list up to 2014 on the fe 450 model.
Cody
Q: I put this on my 2012 yz450f and it makes my pipe pop and cut out. And it’s just not running right. Anyone else have this problem? Or know what to do?
2 months 5 days ago
Buttsnorkler
Verified Purchaser
2 months 5 days ago
A: Need to have you bike tuned to match up with the pipe 
Ed450
Q: Why is the stainless steel and carbon fiber end cap option always out of stock?
2 months 6 days ago
Trevor Gearhead
Top 100
2 months 6 days ago
A: Cause they're awesome! I would need to know what type of machine you need one for and I can get an idea of when we could get one. Feel free to call!
tpriced
Q: Weight of FMF Factory 4.1RCT
Over 6 months ago
What is the weight of the muffler & mid-pipe compared to stock? How many lbs less?
DaveGearhead
Top 10
Over 6 months ago
A: We are not furnished the technical specs for this item. You would need to contact FMF for those specs. Let us know if we can assist you in the purchase.
Joepro4
Q: Midpipe
Over 7 months ago
Does this item come with a titanium Midpipe? I know the slip on itself is titanium and the end cap is carbon. The Midpipe says it’s titanium but in the description it says it’s stainless steel.
David
Top 10 Contributor
Over 7 months ago
A: Mid pipe is going to be stainless steel.
Ray73
Q: Will this fit on a 05 crf450r? Only asking cause I see it fits the 05 crf450x
Over 8 months ago
David
Top 10 Contributor
Over 8 months ago
A: It does not.
gatetwoDNQ
Q: Will this fit my 2018 Husqvarna FX-350 and is this forestry approved for Ca?
Over 8 months ago
matthews13
Top 1000 Contributor
Over 8 months ago
A: This exhaust will fit your bike. However to be forestry approved, you will need a spark arrestor and quiet insert.
maxman16
Q: Will this fit my 2002 yz250f? I was curious because I’m thinking of either getting the power bomb or mega bomb and if it would fit.
Over 9 months ago
*Extra question* Also would this fit a powerbomb header for my 2002 yz250f thanks
Motoexpert
Top 25
Over 9 months ago
A: Yes the slip on will fit either a powerbomb or megabomb header.
1 - 10 of 37
Fitment
See all bikes that this part fits...
See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap and Side Panel 041559
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 043364
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 044443
Blue Anodized Titanium With Titanium Mid Pipe 042285
Natural Titanium With Titanium Mid Pipe 045474
Natural Titanium With Titanium Mid Pipe 042284
Aluminum With Stainless Steel Mid Pipe 045472
Aluminum With Stainless Steel Mid Pipe 044389
Blue Anodized Titanium 041508
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 041473
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 041474
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 042290
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 042291
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 042292
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 043319
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 043347
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 043320
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 044382
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 044427
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 044383
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 041507
Blue Anodized Titanium With Titanium Mid Pipe 042258
Blue Anodized Titanium With Titanium Mid Pipe 044364
Blue Anodized Titanium With Titanium Mid Pipe 044429
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 041440
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 042259
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 042267
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 042286
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 043350
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 043303
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 045561
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 044365
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 044373
Blue Anodized Titanium With Carbon Fiber End Cap 044409
Natural Titanium With Titanium Mid Pipe 042257
Natural Titanium With Titanium Mid Pipe 043348
Natural Titanium With Titanium Mid Pipe 044428
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap and Side Panel 041525
Blue Anodized Titanium and Side Panel/ Fitment 21 041526
Natural Titanium With Titanium Mid Pipe and Side Panel 041527
Aluminum With Stainless Steel Mid Pipe 041517
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 045586
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 042330
Natural Titanium With Titanium Mid Pipe 042331
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 042333
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 044400
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 045558
Aluminum With Stainless Steel Mid Pipe 045566
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 045567
Natural Titanium With Titanium Mid Pipe 045568
Blue Anodized Titanium With Titanium Mid Pipe 045569
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 045570
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 045594
Natural Titanium With Titanium Mid Pipe 045595
Blue Anodized Titanium With Titanium Mid Pipe 045596
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 42348
Natural Titanium With Titanium Mid Pipe 42349
Anodized Blue Titanium With Titanium Mid Pipe And Carbon End Cap 42359
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.