HMF Quiet Core Insert

HMF Quiet Core Insert
HMF Quiet Core Insert

$29.99

Select your ATV to see if this exhaust fits
Description See Also: 6 Reviews 18 Questions Fitment Part Numbers
Item #HMF000G

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6 Reviews
4.2 out of 5 stars
5 Star   3 4 Star   1 3 Star   2 2 Star   0 1 Star   0
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All Reviews
Matty Verified Purchaser
Greenville, NC, USA
Good Value Solution

WARNING... If you are considering a new slip on tail pipe for your ATV, be warned that the HMF muffler sounds like a straight through system with NO baffling!!
My options were to junk the pipe, or to purchase this low cost, easy to install solution.
The pipe is still pretty loud, however, much easier to live with!!

JB72 Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5

Great product. Easy to install.

Doug
Alabama
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Quiet

I dont have a dB reader/gauge so I can not give you the exact dB before and after instullation, but It made a noticable difference. I rejetted carb after instullation and did not notice a power loss on high or low end. Keep in mind you DO need a gasket or it will rattle. It changed the tone of the exhaust aswell but I like it better now than I did before.

MrNacho Verified Purchaser
Puyallup, WA, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Insert used on trx450er with HMF Performance Seri

Ordered this with HMF Performance Series pipe on my wife's 2006 trx 450er and it performed killer. We got Sound tested by the U.S. Forest Rangers last week at Coos Bay bay. the pipe with the power core insert registered 85db and the limit was 93db at the time.
the quad performed really well with this set up after being jetted with the dyno jet kit. it gave real strong performance over stock.

thesaint
Montana
Great product

Just what I was hoping for,quiet for the mountains,easy to pull if need be

TMex
Pasco, WA
It's quiet

I was on the fence with this purchase, but decided to go for it so I would have it in case I went somewhere with noise regs. In short, I could definitely tell the difference on my 660 Raptor. W/O the quiet core, the Raptor took off like a rocket. With the quiet core, it's still better than stock, but much more sedated. The product is very well made and installs in about 5 minutes. I'd give it more stars if it didn't suck as much power away. Good value for the money.

18 Questions
Answered:   18
Not Yet:   0
Tenny0793
Q: Would I have to re-jet or adjust fuel screw? And if so, how do I know when it is adjusted properly?
2 months 13 days ago
I have a 04 dvx 400 with a performance series, just looking to quiet it down a little. What I'm wondering is if I would have to re-jet, if so what sizes I would need, or if it comes to adjusting the fuel screw as mentioned in one of the previous questions, how would I know it is correctly adjusted? Thanks for your time
HMF Engineering
2 months 12 days ago
A: If you're looking to make your exhaust quieter, HMF has a Quiet Core insert that can reduce the sound 2-4dB.

For the proper jetting, HMF recommends:

Recommended Tuning
Slip On - 145 Mikuni Small Main Jet
Full System - 150 Mikuni Small Main Jet

Removing the Air Box Lid or aftermarket filter may require 170-175 Mikuni Small Main Jet

HMF Basic Jet Kit Includes
140, 145, 150, 155, 165, 170, 175 Mikuni Small Main Jet
400EX
Q: This product has a spark arrestor built-in or a spark arrestor is still needed?
Over 5 months ago
HMF Engineering
4 months 9 days ago
A: All HMF Exhaust systems come with a USFS Approved Spark Arrestor.
Liam
Location: New York, NY, USA
Q: Does a exhaust silencer take away power?
Over 6 months ago
I wanted to buy the HMF full system exhaust for my Raptor 700R but i read on line that it was a little too loud and i live in an area with lots of neighbors so i thought i would buy a silencer for the pipe but then saw it might take away power from the exhaust. Does anyone has any experience with this pipe and know if a silencer will take away performance and speed from my quad?
HMF Engineering
4 months 4 days ago
A: The HMF exhaust systems on the Yamaha Raptor 700R will be 4-6dB louder than your stock muffler, and picked up 2-3 more horsepower. If sound is a concern, we have a universal Quiet Core that will drop 2-3dB. You can see all the specs here: http://www.hmfracing.com/exhausts/yamaha/raptor-700
stlhed
Location: Oregon, USA
Q: Will this fit a muzzy ehaust as a quiet core rhino 660?
Over 7 months ago
MotoSportExpert
Expert MotoSport Staff
Over 7 months ago
A: The HMF Quiet Core Insert is designed to fit HMF sport series mufflers. Fitment with the Muzzy can not be guaranteed and will likely not fit.
HMF Engineering
4 months 4 days ago
A: It does not fit the Muzzy Exhaust
Trev
Q: Is the hmf competition exhaust, a sport series exhaust?
1 year 6 months ago
MotoSportExpert
MotoSport Staff Expert
1 year 6 months ago
A: No the quiet core will not work due to the competition inserts taking the place of it. If you have the stage 1 insert, it will drop the decibel levels more than a quiet core would. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Ulysses
Location: Miami, FL, USA
Q: Will this fix my 2006 Kawasaki Prairie KVF 360?
1 year 8 months ago
MotoSportExpert
MotoSport Staff Expert
1 year 8 months ago
A: This HMF Quiet Core Insert works with HMF sport series pipes only. If your have the stock exhaust on your 2006 Kawasaki Prairie KVF 360 it would not work. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
AKRenegade426
Location: Palmer, AK 99645, USA
Q: Will this work on the HMF Swamp Series XL pipes? I got an '07 Can-Am Renegade 800.?
1 year 9 months ago
MotoSportExpert
Expert MotoSport Staff
1 year 9 months ago
A: Yes this HMF Quiet Core Insert (6946006) fits:
Peformance Series
Swamp & Swamp XL Series
Penland Series (Torque Range Modifier removed)
Signature X Series
kevin
Q: Will this replace the stock baffle?
2 years 2 months ago
Have a honda 400ex with a kmf withour baffles will this help
MotoSportExpert
MotoSport Staff Expert
2 years 1 month ago
A: The HMF Quiet Core Insert works with the HMF sport series pipes only. The Stock baffle can be found in the OEM section for your 400EX.
http://www.motosport.com/atv/oem-parts/honda/
benny
Location: Dewhurst VIC 3808, Australia
Q: G'day, i have a stock standard LTZ400 2007, will this quiet core insert make a standard muffler even quieter? cheers ben?
2 years 2 months ago
MotoSportExpert
Expert MotoSport Staff
2 years 2 months ago
A: It probably would if you could make it fit but the HMF Quiet Core Insert is designed for HMF sport series pipes only.
ajaustin617
Q: Will this fit the bill balance slip on?
2 years 4 months ago
MotoSportExpert
Top 1 Contributor
2 years 4 months ago
A: No. This is only for a HMF exhaust.
1-10 of 18
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# Part Numbers
Product Variant Manufacturer Part #
HMF Quiet Core Insert 6946006
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