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

$337.99 - $584.99
10% Off - Save up to $65.00

Item #FMF000P

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72 Reviews
4.9 out of 5 stars
5 Star   69 4 Star   2 3 Star   1 2 Star   0 1 Star   0
All Reviews
Dean
1 month 8 days ago santa cruz ca
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
The ONE !!

If you need a Exhaust with a removable spark arrestor and a great exhaust this is it. Motorsport came through while the rest failed..!!!

Scotty P Verified Purchaser
2 months 4 days ago Maple Valley, WA
Durability5/5Ease of Installation4/5Performance5/5Power5/5Style5/5
Its an FMF - Nuff said!

I've had at least three of these pipes on different bikes - all of them have been extremely easy to install, fit great and sound awesome. They are slightly quieter than the stock MX pipes on my bikes, but the sound is deeper and sounds a lot better in my opinion. Without a doubt would recommend an FMF for any bike!

S4Racing Verified Purchaser
3 months 22 days ago Rainier, Oregon
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Great looking exhaust...

I put a complete system on, looks great, sounds great, lost some overall pounds. Not sure if I gained a lot in performance, but very happy with the exhaust system.

Fill Ups Life
4 months 25 days ago East Coast
Durability3/5Ease of Installation5/5Performance5/5Power5/5Style5/5
GREAT Sounding Exhaust!

Easy to install. Came with all necessary hardware including the header pipe adapter and spark arrestor. This thing looks wicked on my 2018 KTM 250 EXC-F. I ordered the blue titanium, and the blue anodize can mark or stain easily. I hope the blue anodize holds up, and I wish FMF would have used something other than a regular sticker to identify the pipe. Due to a slight back fire, which was caused by lean fuel and emissions, I removed the intake reeds in conjunction with installing this exhaust. I also installed a JD Tuner ECM to increase fuel to the injector, and disabled the exhaust emission. Performance gain is noticeable. However, the best thing about this slip-on exhaust is the sound. DEEP, LOUD, BRAAAP!

brembe621 Verified Purchaser
Over 5 months ago New York
Durability5/5Ease of Installation5/5Performance5/5Power4/5Style5/5
Great Buy

Installed on my KTM 250 EXC-F with ease. Took maybe a total of Ten minutes including removal of stock muffler. Woke the bike up giving me increased low and mid range torque using stock header and a sick exhaust note.

Chris harp 331 Verified Purchaser
Over 5 months ago Austin tx
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Braaaap

Awesome fit just right , wish it was lower price but hey can’t look like a goon braaaaaaap

Luke
Over 5 months ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Great sound!

Great sound, great price and makes the bike look better!

Colby Knight
Over 6 months ago Fairfield Maine
Durability5/5Ease of Installation4/5Performance5/5Power5/5Style5/5
Great Exhaust!

I bought this muffler about a week ago and I love it already! Great sound and great performance! Buy this muffler if you want to have a lot more fun riding!

Btoz
Over 6 months ago Idaho
Durability3/5Ease of Installation3/5Performance5/5Power5/5Style5/5
I like everything about it

I’ve read where the exhaust doesn’t add power but I can feel a big difference all through the rpm range and I’m running the insert. It does pop when you maintain mid-low rpm and just cruising it also makes the bike a bit “light switchy”.

J Hanny Verified Purchaser
Over 6 months ago Simi Valley CA
Durability5/5Ease of Installation2/5Performance5/5Power5/5Style5/5
Awesome exhaust!

Low end power is definitely higher and the bike breaths a lot better!

See 10 More Reviews
49 Questions
Answered:   45
Not Yet:   4
Smith6389
Q: Just bought one of these for my 2019 kawi kx250. Ad says it comes with 2 inserts and my box only had the spark arrestor. Missing the quiet insert. 
4 months 28 days ago
Trevor Gearhead
Top 10
4 months 28 days ago
A: Please give us a call so we can help out!
Mocaby24
Q: Does the slip on fit a stock 2017 rmz450 head pipe? I plan on buying the power bomb header later but will it fit my stock header for now?
Over 5 months ago
Brando
Q: Would I need to get my 2016 yz450f tuned if I got this slip on?
Over 6 months ago
Quentin
Q: Could i use this pipe on my xr80
Over 7 months ago
MattGearhead
Top 25
Over 7 months ago
A: This item is not available for any year of Honda xr80's. If you have any questions on what exhausts we have that will fit your bike please call one of our experts at 1-888-676-8853
Tylerj
Q: Will this fit a 2013 Yamaha ttr-125 and if so should I get it tuned 
Over 7 months ago
JerryGearhead
Top 25
Over 7 months ago
A: This muffler will not work on your 2013 Yamaha TTR125.
Redale450
Q: Will it fit a 2007 Suzuki RMZ 450?
Over 7 months ago
Trevor Gearhead
Top 10
Over 7 months ago
A: No, it will not. Enter the year, make and model of your machine into our website for exhaust that will. "Exact fit", will be indicated.
Mathew
Q: 2015 Yamaha yz250f, will I need it tuned in with just a slip on (with the stock header)?
Over 8 months ago
DaveGearhead
Top 1
Over 8 months ago
A: With any change to your intake or exhaust it is highly advised to tune your bike. Not doing so could leave your bike susceptible to damaged caused from running too lean.
Juancarlospita
Q: Does that exhaust need an adapter to fit on a ktm 350 exc f 2019 ? 
Over 10 months ago
Trevor Gearhead
Top 10
Over 10 months ago
A: I see no adaptation needed to fit your 2019 KTM 350 EXCF. Perhaps a spacer of some sort but everything should be included from FMF.
Daryl
Q: Does this exhaust have a built in spark arrestor
Over 10 months ago
Mauricio18
Q: Does this exhaust need tuning for a 2011 YZ450F 
Over 11 months ago
DaveGearhead
Top 1
Over 11 months ago
A: You would need a tuner if you run this system.
1 - 10 of 49
Fitment

See all bikes that this part fits...

See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Natural Titanium With Titanium Mid Pipe 045474
Aluminum With Stainless Steel Mid Pipe 045472
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 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 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 042357
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
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 042369
Natural Titanium With Stainless Steel Mid Pipe 042370
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 042371
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 044453
Natural Titanium With Stainless Steel Mid Pipe 044454
Blue Anodized Titanium With Titanium Mid Pipe And Carbon Fiber End Cap 044455
Stainless Steel with Carbon End Cap 042374
Natural Titanium 042375
Titanium Anodized with Carbon Fiber Cap 042376
Stainless Steel with Carbon Fiber Cap 043372
Titanium Anodized with Carbon Fiber Cap 043373
Titanium Anodized with Carbon Fiber Cap 045629
Titanium Anodized with Carbon Fiber Cap 045633
Aluminum With Stainless Steel Mid Pipe And Carbon Fiber End Cap 045632
Aluminum with Carbon Fiber End Cap 045628
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.