To give our customers the best shopping experience, our website uses cookies.  Learn More

FMF Power Core IV S/A Silencer

Fits Your MachineDisplaying parts for your 2008 YAMAHA TTR230
FMF Power Core IV S/A Silencer
  • View Larger
  • Video

FMF Power Core IV S/A Silencer

Fits: 2008 YAMAHA TTR230

Part# 1047000051 | Mfg Part# 044141

Our Price: $287.99

MSRP: $319.99 - You save $32.00 (10% off)

Get $14.40 in Quick Cash

View Product Details

1 In-Stock

Live Help

Additional Videos

FMF Factory | Inside Look

How To - Repack A Silencer For Your ATV Or Motorcycle

RM YouTube Channel
SUBSCRIBE

Details

    FMF’s Power Core IV S/A Silencer aims to give your motorcycle, UTV, or ATV a near perfect balance of price, durability, and performance that won’t leave you wanting anything else. Cues for performance were taken from FMF’s top of the line exhaust systems for a solid boost to both horsepower and torque. And with that power you still have the option to run either a USFS approved spark arrestor or optional 96db quiet core.

    The aluminum body also promotes performance and quiet operation thanks to the ample room for packing material that extends the period between repacking / servicing. With the Power Core IV S/A being rounded off with quality construction, great looks, and interchangeable inserts, this silencer is near the top of the list when you're looking for aftermarket exhaust.

    Specs:
  • Aftermarket silencer for your 4 stroke
  • Comes with USFS approved spark arrestor installed
  • Increase in horsepower and torque over stock
  • Durable stainless steel end cap and mid pipe
  • Lightweight aluminum oval canister
  • Lower weight compared to stock exhaust
  • Easily disassembled for maintenance
  • Advanced packing material extends life
  • Optional 96dB quiet insert available
  • Champagne color anodized canister
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

FMF Power Core IV S/A Silencer Reviews

Rocky Mountain ATV/MC gift card Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
WRITE A REVIEW
4.8 / 5.0
179 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
156
19
1
1
2
Value
4.7 / 5
Durability
4.9 / 5
Ease of Installation
4.8 / 5
Fitment
4.9 / 5
Performance
4.9 / 5
Finish
4.8 / 5
Features
4.8 / 5
Recommend it?
Yes (62)
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Best exhaust
I was in need of some new exhaust for my bike. When I bought my bike it had a terrible muffler on it (not FMF) and you can’t go wrong with a FMF! It sounds so much better and really woke my 250F up! 10/10 would recommend!
April 16, 2020
Rapid City, SD, US
Age: 25-44
Purchased
1 month ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Scares the neighbors
I like to take my CRF250F on a spin around the neighborhood on Sunday mornings. The addition of this pipe has made this bike LOUD.

-m-2019 HONDA CRF250F--
October 11, 2019
Gainesville, GA, US
Age: 45-64
Purchased
9 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
Value
4 / 5
Durability
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
4 / 5
Recommend it?
Yes
I love how it looks and sounds
Sounds so per nice direct fit on the bike

-m-2006 HONDA CRF250R--
September 5, 2019
Aurora , OR, US
Age: 15-24
Purchased
10 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
FMF makes the Honda CRF 250F perform like it should!
I was a little apprehensive about adding an exhaust to my bike. Since it is a brand new model from Honda, the CRF 250F, I didn’t know anyone that had done an exhaust upgrade yet. But, I took the leap and couldn’t be happier! The muffler absolutely opens up the 250 F, like it should have been from the factory! Definitely can feel the power increase and the sound is amazing! I absolutely could not be happier! I even ordered the header from FMF since Rocky Mountain doesn’t have it yet. Should be getting it in sometime next week and look forward to installing it! I don’t feel like I needs to have the bike reprogrammed since I added the muffler ( like I was concerned that I may have to), it rides amazing, even better than before! If you are thinking about adding this muffler, do it, I guarantee you will be happy with it!
User submitted image
Added Sep 4, 2019
September 4, 2019
Douglasville, GA, US
Age: 15-24
Purchased
9 months ago
Gender:
Male
Weight:
131 - 160 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Great slip on it is loud. Can’t fine a quite insert.

-m-2002 SUZUKI DR-Z 400S--
July 18, 2019
Corning, CA, US
Age: 45-64
Purchased
11 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Fits and looks good, but is loud.
This silencer went on easy and fit just like the stock one. My only complaint is how loud it is. There is a label on it that basically says it is not legal for street use, but I did not see that in the description of the product. There is a note about an Optional 96dB quiet insert but do not see how or where to purchase that. Have only been running it for a week so I can't comment on its durability.

-m-2003 YAMAHA TTR250--
July 17, 2019
La Grande, OR, US
Age: 45-64
Purchased
11 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
4 / 5
Durability
4 / 5
Ease of Installation
4 / 5
Fitment
4 / 5
Performance
4 / 5
Finish
5 / 5
Features
4 / 5
Recommend it?
Yes
Solid Pipe
Installation was simple and fairly quick. Could feel the increase in HP. Was hoping for a deeper more throaty sound but it was a little better than stock pipe. Overall, I'm happy with the purchase.

-m-2009 YAMAHA YZ450F--
July 17, 2019
98038, WA, US
Age: 45-64
Purchased
11 months ago
Gender:
Male
Weight:
161 - 190 lbs.
Height:
5'10 - 6'0
Value
5 / 5
Durability
5 / 5
Ease of Installation
4 / 5
Fitment
4 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Should have bought this years ago!
A little loud but I knew this from reading previous reviews, but it is okay as I am losing my hearing anyway. Bike has a little more pep now. Ease of installation was easy, just had an issue with the bracket that holds the rear of the exhaust in place, I had to do some bending on the bracket to make it fit correctly. Pipe weighs five pounds compared to the OEM exhaust that weighs 10 pounds! Ordered the pipe Saturday evening, figuring that it would be Thursday when it would show up, but came in Tuesday afternoon. Very happy with their customer service!
July 12, 2019
MARKLEEVILLE, CA, US
Age: 45-64
Purchased
11 months ago
Gender:
Male
Weight:
191 - 220 lbs.
Height:
6'1 - 6'3
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
FMF Powercore IV for XR650L
This quality product was packed well and shipped without damage. Direct replacement and even fit with my RMATVMC TUSK aluminum panniers and pannier rack system.

Comes with a removable spark arrestor insert, be sure to insert it and screw in the included retaining screw with an Allen wrench prior to riding on public lands that require spark arrestors.

Loud-ish, but I knew that when I ordered it. Bike breathes very well now.
June 4, 2019
Burley, ID, US
Age: 45-64
Purchased
1 year ago
Gender:
Male
Height:
>6'7
Value
5 / 5
Durability
5 / 5
Ease of Installation
5 / 5
Fitment
5 / 5
Performance
5 / 5
Finish
5 / 5
Features
5 / 5
Recommend it?
Yes
Love it
Great Product
Extremely Happy with my purchase

-m-2002 SUZUKI DR-Z 400S--
2002 Suzuki DRZ 400S
I LOVE THE THE FMF POWER CORE IV S/A SILENCER
2002 Suzuki DRZ400 S
LOVE THE NEW FMF PIPE
April 15, 2019
Tracy, CA, US
Age: 45-64
Purchased
1 year ago
Gender:
Female
Weight:
101 - 130 lbs.
Height:
5'4 - 5'6
Show more
Rocky Mountain ATV/MC gift card Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 43 questions Browse 43 questions and 85 answers
Where can I purchase the Optional 96dB quiet insert ?
Mark B on Jul 17, 2019
If your buying for the 06 and newer crf250r does it come with 2 pipes?
A shopper on Sep 19, 2016
BEST ANSWER: No, it's just a single pipe.
Does this Silencer connect to the stock header?
A shopper on May 23, 2017
BEST ANSWER: Yes it does you'll just need some heat temp silicone which isn't supplied but suggested in the instructions
has any body put the the fmf 4 on a klx 450 r ? any jetting tips
Brad T on Nov 13, 2016
BEST ANSWER: Brad, we have not mounted the FMF on the KLX. but have had very good results on the DR 650 and the Husaberg FE 450. We added a bigger Mikuni on the 650 and used stock jetting, the Husaberg is injected so NA there. The weight savings on both is a big plus especially the DR650 POUNDS SAVED! Great sound, better throttle response on both throughout power band.
Does this fit the fmf power bomb because I have this and the fmf power bomb and it doesn't slip on?
Austin H on Mar 22, 2018
BEST ANSWER: I use the powerbomb header and FMF powercore 4 silencer on an XR650L with no problems
Would this pipe give me power gains over the restrictive stock silencer on an 08 yz450f?
JOHN H on Mar 3, 2019
BEST ANSWER: I'm sure it would, made a dramatic increase on my XR 650. But I had to go up 5 jet sizes
to tune it. I also installed the power bomb header.
Does the spark arrestor make the sound less strong?
Jérôme G on Dec 28, 2017
BEST ANSWER: Not really. Its just a small cone shaped screen. To me it seemed just a tad less noisy at idle but about same when hard on the gas. Mine was a bit less noisy than a earlier version of same exhaust though.
does this muffler assembly come with a new exhaust donut/gasket? or do I need to purchase a new one
DANIEL W on Apr 5, 2017
BEST ANSWER: It's been over a year since I installed. To my recollection, it was the muffler only. I would reach out to FMF directly or the distributor. Sorry I couldn't have been more help.
My son installed this new FMF exhaust and didn't tighten the bolts before he went for a quick ride. He's now list the bolt that attached the exhaust to the frame just below the seat. What size should that be?
Aaron K on Jan 13, 2018
BEST ANSWER: Need year, make, model of the machine. Probably fastest to just take another one of the same size off the machine that fits the hole and take it to a hardware store and match it up.
Does it come with new muffler clamp that conects the two pipes Together or is this the whole system?
Kenny D on Jun 29, 2017
BEST ANSWER: This is a slip on silencer (muffler), Slips on to your stock header pipe, it does come with the clamp and all hardware to bolt on to your bike
Will this just slip on a 2001 Yamaha warrior? Also will it require a re jet?
Dylan C on Oct 6, 2019
BEST ANSWER: I put it on a Honda 150F and it attached where the factory pipe/muffler split. Nice stainless clamp and no leaks. I did not have to rejet, I believe you only need to do that if you do the pipe and muffler.
Will I need to rejet a 2007 TTR 230 if I add this ?
John B on Dec 5, 2017
BEST ANSWER: It was installed on the 24th, ran just fine, no need to rejet ! GREAT PRODUCT !
Does this come with the gasket that goes between the head pipe and muffler? I have a 2009 Honda Crf450r.
Joshua A on Feb 15, 2017
BEST ANSWER: If it's needed it will. If not then you just put it together with heat temp silicone as stated in the instructions it comes with
When buying this product ( FMF Power Core IV S/A Silencer
Fits: 2004 YAMAHA WR450F) what size jets do i need?
Brett S on Mar 25, 2020
FMF Power Core IV S/A Silencer
FMF Power Core IV S/A Silencer
FMF Power Bomb Header Pipe (NO CA)
FMF Power Bomb Header Pipe (NO CA)
BEST ANSWER: I have an 04 kx250f and I’m still at my stock settings, tried different jet and settings per there instructions but didn’t seem to run right so I put back to stock settings. Try it stock first, that would be my suggestion
will this fit my 2019 HONDA TRX 250X?and what jets to go with?
Richard S on Oct 19, 2019
FMF Power Core IV S/A Silencer
FMF Power Core IV S/A Silencer
JD Jetting Jet Kit
JD Jetting Jet Kit
BEST ANSWER: Oops I found the TRX! But still, this is not the correct one. The one you need is FMF number 41269. The Rocky Mountains number is 1047000081. Hope this helps!
For my warrior, I just can buy the silencer? Can I get the whole thing like headers and the power bomb or not? And do I have to adjust something From the engine??
Just bolt it and that’s it? Thank you
Jean-philippe P on Oct 17, 2019
BEST ANSWER: FMF says it will work with the stock header or power bomb , if you have many other mods done you may want to go up one main jet size and up one slow jet size for better performance.
For a 2018 yfz450r slip on does it come with instructions?
Emmanuel R on Aug 10, 2019
BEST ANSWER: When I bought mine for my kx250f. Don’t remember it coming with instructions. They are very easy to install. Just unbolt the one on your bike,slide it off the head pipe and slide the new one on and bolt it up. If still unsure go to YouTube.
What the difference between the FMF Power core IV and FMF Q4? Is there a real noticeable difference? Does one flow or perform better than the other? Or are they 6s? Riding 2008 KLX450R.
Brett S on Mar 20, 2018
BEST ANSWER: The power core IV is designed to give your machine more power throughout a certain RPM range (usually it's a wider mid range) The Q series is designed to quiet your machine down. It might show the results on a dyno but personally unless you're all out racing on a track I don't think you'll notice any difference. Now that I'm older and have tinnitus from loud noises I personally recommend the quiet ones so you're not being obnoxious and causing someone else deafness. If you're still in doubt call Donny Emler at FMF. He's a great guy and a wealth of knowledge. He used to help me back in my racing days. Good luck.
This fmf powercore 4 exhaust for a warrior 350 come with quite core and spark arrestor ??
Joshua O on Nov 13, 2017
BEST ANSWER: Yes on both, but keep in mind it will be louder than stock.
Does this pipe come with a header pipe and if not does it fit on my stock header? 1999 wr 400f
A shopper on Jan 23, 2017
BEST ANSWER: Bought this for a 2004 yamaha raptor 350. The fit was perfect to the stock header. It did not come with a header pipe. Great sound and a little seat of the pants power..
getting this for a 2013 raptor 350. does there need to be any jetting changes to make this all work at max performance? thanks.
bfmorro on Mar 26, 2020
BEST ANSWER: Jetting is dependent upon multiple things; altitude, weather, other after market parts. Unfortunately, we cannot give any recommendations on jet sizing. You will need to look in your owners manual or contact a mechanic for recommendations.
I bought this pipe for my 2020 yamaha ttr 230 I live in missouri what is the jetting supposed to be??
Mandi S on Jan 25, 2020
BEST ANSWER: Unfortunately we can't recommend jet sizes. I apologize about the inconvenience.
Can the end cap be replaced with carbon fiber cap?
Tyler D on Dec 1, 2019
BEST ANSWER: Short answer is YES, however the stock end cap has an awesome deep sound to it and depending on ur type of riding, sounds REALLY Good w/o the spark arrestor.
could i run this exhaust on my stock pipe on 2006 yz250f?
A shopper on Oct 23, 2019
BEST ANSWER: Yes, this is made to fit with your stock pipe.
If I buy the powercore 4 slip on for my 2018 yfz450r and then later on decide to make it into a full system would this slip on fit with the power bomb or mega bomb header?
Emmanuel R on Aug 11, 2019
BEST ANSWER: As long as you are ordering for the same machine the head pipe (or expansion chamber depending on the machine) will fit on the silencer.
On a 2018 yfz450r , is the powercore 4 slip on shorter than the fmf factory 4.1? I want the shorter of the 2 pipes. Powercore 4 slip on sticks out further back more than stock muffler? Does the powercore 4 for the yfz450r have one or 2 hanger brackets and how is the fit when lining up the holes to the subframe.
Emmanuel R on Aug 10, 2019
BEST ANSWER: Both exhaust will have 2 hangers and they are the same length. They are constructed very similar. The power core 4 is a inexpensive alternative to the top 4.1 system.
For a 2018 yfz450r for a slip on, does it come with a clamp or you reuse the stock clamp?
Emmanuel R on Aug 10, 2019
BEST ANSWER: I have bought one of these for quite a few bikes and it comes with everything you need. have not purchased it for your specific bike but it should come with everything
Does anyone know if this will fit a 2019 crf 250f ?
kyle n on Jul 27, 2019
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2020 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
Hi I have a can am ds 450 would this fit this?
A shopper on Jul 25, 2019
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2020 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
Will this fit my 2009 crf 150f?
colton k on Jun 21, 2019
BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2020 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
RM Cash ProgramParts Finder