Choose a vehicle:

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

» Log in to use your Rider Profile Machines
HMF Racing Competition Series Silencer
  • View Larger

Customer rating on this product:

Read reviews (9) | Write a review

Sales Live Chat

HMF Racing Competition Series Silencer

Select type, make, model and year above

  • "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 Trimax Core technology features 3 levels of power and sound, allowing you to dictate the type of power and sound you need, when you need it.
  • Included with every exhaust are 2 removable inserts, each of which effect the sound and power in different ways, giving the rider complete control.
  • Stage 1 Uses an insert that restricts sound levels extensively yet produces industry leading power at the approved dB level.
  • Stage 2 Uses a different sound-altering insert that partially lowers sound levels without losing the power increase gained in Stage 3.
  • Stage 3 Acts as an unrestricted core producing high dB levels with industry leading power throughout the entire RPM range.
  • Features a black powder coated exhaust shell, stainless Euro End Cap, rivet bands, and the HMF team sticker for a completely upgraded look.
  • Inlcudes a USFS Approved Spark Arrester.
  • 2 Year Limited Manufacturer’s Warranty.

HMF Racing Competition Series Silencer 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!

1 of 1 people found this review helpful.

Slip-on

Comments On Apr 11, 2014:it only fits the stock head pipe. more info would have been nice. It didn't say that it was a slip-on.

Was this review helpful?

1 of 1 people found this review helpful.

Awesome exhaust

Comments On Dec 18, 2013:Increased everything I need on my 400ex. The looks, the power and the sound. I love that I can regulate the noise output. Spark filter is easy to take out and clean.

Was this review helpful?

1 of 2 people found this review helpful.

slip on or full ???

Comments On Oct 20, 2012:is this just a slip on exhaust or full.??
TECH NOTE: This is just a slip-om muffler.

Was this review helpful?

1 of 1 people found this review helpful.

Loud

Comments On Jun 04, 2012:Have it on my 06 raptor 700 stage 3 is loud runs great with the power commander..

Was this review helpful?

1 of 2 people found this review helpful.

Nice and loud

Comments On Sep 27, 2011:This exhaust sounds wicked and now my 700xx pulls all the way through the powerband

Was this review helpful?

1 of 1 people found this review helpful.

2008 Honda TRX450ER

Comments On Sep 26, 2011:I cant believe the power gain i got out of this exhaust!! HMF pipe are very tough and built out of stainless steel and aluminum parts. BUY IT NOW!!

Was this review helpful?

2 of 2 people found this review helpful.

, Stop thinking, just buy it.

Comments On Jul 31, 2011: I just bought a bone stock 2007 RAPTOR 700 SE. I rode the bike at Mountain View WYO. (BADLANDS). It ran good but I'd heared from several people who ride Little Sahara that I could make it so much more. I purchased this pipe and installation was easy, a perfect fit. I also purchased a K&N filter kit at the same time. I used my stock airbox and added several 1" holes in the lid. WOW!!! Trust me, the difference is huge. It is very loud with the big tip. I run the mid tip with the spark arrestor for daily riding, still loud and very big HP increase.

Was this review helpful?

0 of 0 people found this review helpful.

Best Exhaust Ever!!

Comments On Jul 05, 2011:I had been searching for an exhaust for my Trx450r for about 2 months!!! After looking at hundreds of reviews of many different types of exhaust,, I finally found the right one!!! It sounds clean and is loud ,with stage 3 end cap on, and gave a great power boost,,and I just bought the slip on!!! The quality is great!!! Installation is very easy as well!! 5 star product!! Price is reasonable too!!

Was this review helpful?

0 of 0 people found this review helpful.

Assembled quick, sounds great and can feel the HP

Comments On Jun 16, 2011:I have had this installed for about a week now and i love it! I havent tried the other 2 stages, but it comes with nothing but the spark arrestor in it. Mounted pretty easily and lined up about perfect! I would advise the HMF Optimizer as well if this pipe is going on an EFI. If not there will be a slight bog but nothing giving throttle cant fix. On a 2010 YFZ 450X

Was this review helpful?

Frequent Buyer ProgramParts Finder