HMF Racing Quiet Core Insert
  • View Larger

Customer rating on this product:

Read reviews (5) | Write a review

Sales Live Chat

HMF Racing Quiet Core Insert

Part# 1335320001

Our price: $24.99

View Product Details

5+ In-Stock

Speed Through Checkout! No Wallet Required! SM
Bill Me LaterSee Terms

| Subject to Credit Approval

  • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

    -Dan Thomas, CEO and Founder

  • Returns

    We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.

  • Warranties

    We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.

  • Have questions?

    Live chat: Click here (Leave email if after hours)
    Email:sales@rockymountainatv.com
    Call us: 1 800 336-5437
    7am-7pm Mon-Fri 8am-4pm Sat (Mountain Standard Time)

  • The HMF Quiet Core is an insert made of 1010 Steel and installs on most HMF exhausts in seconds.
  • It's designed for sound sensitive riding areas and decreases the sound level approximately 3-6dB.

HMF Racing Quiet Core Insert Reviews

Your review could win you a $100 or $500 gift card!

Each review submitted enters you into a $100 gift card monthly drawing, and a $500 gift card quarterly drawing!

0 of 0 people found this review helpful.

This Works

Comments On Jan 18, 2014:Installed in Competition Series slip-on on 2005 TRX450R. Brought noise down substantially versus the Stage 3 insert that was in it (the stage 1 and 2 inserts were not available to me). The sound is not as quiet as the OEM muffler, but it's about equal to a quiet dirt bike such as a CRF250R. I would call it a happy medium of performance and sound between a choked-up stock muffler and a loud and raspy open aftermarket unit. 5 stars.

Was this review helpful?

0 of 0 people found this review helpful.

No Power Lost

Comments On Sep 05, 2013:Works great to reduce the db's. The design is prone to plugging up with muffler packing. Be sure to take it off and clean it regularly, especially if you have a new pipe

Was this review helpful?

0 of 0 people found this review helpful.

Cool Product. Great Price.

Comments On Mar 05, 2013:Cool Product. Great Price.

Was this review helpful?

0 of 0 people found this review helpful.

It lowers the db, but it lowers performance too.

Comments On Dec 28, 2012:It is very easy to install. For my KFX450R, take the end cap off and there is a recessed area that it fits right into. The flange was slightly thinner than the recessed area, so it rattled a little, but not bad. The db's are difinitely reduced by a very noticeable amount. Performance was not reduced at lower rpms, but the reduced diameter of the quiet core pipe definitley robs some mid and upper rpm power. Usually the atv would easily wheelie while riding in the woods/trails in 3rd adn 4th gears with just little rises in the trail. This was not happening with the quiet core installed. Still if you are going somewhere that requires reduced db's then this will get your atv qualified.

Was this review helpful?

0 of 0 people found this review helpful.

Quiet and Loud

Comments On Nov 30, 2012:Really quiets the noise down at low rpm to a tolerable level and still has a good note when you get on it. Works with the factory spark arrestor too, keeps the rangers happy. It also helped my backfiring when cold, didn't need to add a FI optimizer.

Was this review helpful?

Frequent Buyer ProgramParts Finder