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HMF Competition Slip-On Exhaust
HMF Competition Slip-On Exhaust

$305.99 - $414.95
10% Off - Save up to $45.00
4.90 5 42
Rating: 4.9 out of 5 stars

Item #HMF0007

42 Reviews

4.9 out of 5 stars
  •   39 reviews
  •   2 reviews
  •   1 reviews
  •   0 reviews
  •   0 reviews

All Reviews

Tractor

Verified Purchaser
4 months 18 days ago Ny
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
Awesome

This pipe.is loud as ever neighbors hate me loud it.fit.perfect.and definitely gave my yfz a lil spunk.too

Hillbilly

Verified Purchaser
Over 5 months ago Elkins WV
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
Love the sound

Installed on my 2019 YFZ 450R I had to order the programmer from HMF to stop the popping

Ronald

Verified Purchaser
1 year 3 months ago
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
4/5
Style
5/5
Freat

Asesome cant get wbougg if it gas a lotta powrr

Mitch

1 year 9 months ago Ocala, FL.
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
What you’re looking for

Put it on my 2014 z400 a couple years ago also used the hmf tuner for fuel injection it gave it a noticeable jump in power there is more low to mid range torque helping the acceleration and it sounds awesome. I’ve ran other pipe on multiple bikes and for anything four stroke hmf always has given me the best resaults!

Raptor

Verified Purchaser
1 year 10 months ago Illinois
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
Loud and powerful

This slip on will give your atv more power. It also looks awesome! Installation easy. I installed it in 1 hour. If your looking for power HMF slip on exhaust is it!

YFZ450rider

2 years ago Bridgeton, NJ 08302, USA
5 out of 5 stars
Durability
5/5
Ease of Installation
4/5
Performance
5/5
Power
5/5
Style
5/5
Sounds great

I have this on my 2011 YFZ450 and it sounds great. It outshines my friends fmf and sounds and looks better

Ricky

2 years 7 months ago
3 out of 5 stars
Durability
4/5
Ease of Installation
3/5
Performance
5/5
Power
5/5
Style
5/5

Looks and sounds great, but mounts did not line up I had to drill new holes on the exhaust mounts for the bolts to align. 2012 ltz 400

AustinG

Verified Purchaser
2 years 9 months ago Otway
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
Best purchase ever

The HMF Competition series slip on has been by far the best exhaust i have put on my 2005 400ex i did not have to rejet with the exhaust just brought it in took about 10 minutes to install fired it up it sounds amazing and it also increased overall performance and speed

pimp

Verified Purchaser
2 years 11 months ago Illinois, USA
5 out of 5 stars
Durability
4/5
Ease of Installation
4/5
Performance
5/5
Power
5/5
Style
4/5
AWESOME PIPE

HMF competition slipon has amazing sound. When I get on throttle it lets a throaty deep roar that simply sounds amazing! I ride a TRX700xx and it was a must for an upgrade.

Dave

Over 3 years ago Pompton Lake, New Jersey, USA
5 out of 5 stars
Durability
5/5
Ease of Installation
5/5
Performance
5/5
Power
5/5
Style
5/5
HMF

I love this muffle I had it on my old quad and sold it I'm saving up for a new one love these and will always have one on my quad

46 Questions

  • Answered:   46
  • Not Yet:   0

Question asked by Yaelp

Question: Is this louder than a fmf 4.1 rct? 
Question asked 1 month 8 days ago
Question answered by robert
User's contributor status: Top 10
Question answered 1 month 8 days ago
Answer: The decibel level is determined by the bike it is adapted too. Both slip on will have a higer rating the stock on the sound.

Question asked by Nathan

Question: Can I put this on my kfx 450 it’s a 2014 model. Would I have to tune it. It’s a fuel injection.
Question asked Over 8 months ago
Question answered by Trevor Gearhead
User's contributor status: Top 10
Question answered Over 8 months ago
Answer: Yes. Enter your year, make and model into our website to ensure proper fitment.

Question asked by Jon69

Question: I want to get one for my 2019 yfz 450r, do I need to tune it or not? I read that it can damage engine and exhaust if not tuned.
Question asked Over 9 months ago
Question answered by Paul
User's contributor status: Top 10
Question answered Over 9 months ago
Answer: We have the HMF Competition Slip-On Exhaust for your 2019 YFZ450R.

Whether for a sport bike, dirt bike, cruiser, or ATV, an after-market exhaust system or a slip-on muffler will improve the performance of your motorcycle, which is particularly important for the race track and competition.
The stock exhaust systems are designed to meet the emissions and noise-level restrictions set in place by most federal, state, and local authorities, and laws vary from state to state. It’s important that everyone check with local laws to understand what changes to your stock exhaust system are permitted.
Most after-market exhaust parts are lighter weight than the originals from the manufacturers. Most after-market exhaust parts allow the exhaust to flow more freely, and with reduced back pressure, and thereby improve performance. Performance improvements might be achieved with higher horse power and top end speed, or tuned for better low-end torque and quicker acceleration.
Allowing the exhaust to flow with less restriction usually demands adjusting and retuning of the fuel/air system, whether it is carbureted or fuel injected. In many cases, you might not know whether or not adjustment or retuning is needed until after you installed the new exhaust and taken it out for test-ride.
Fuel injection systems are usually electronically controlled. Adjusting and tuning fuel injection systems usually require a fuel management system. More information is at this site: http://www.motosport.com/blog/sportbike-and-motorcycle-fuel-management-guide

Question asked by Ricardo03

Question: If i apply a full hmf comp exhaust will i have to retune even if i have fuel injectors and an intake
Question asked 1 year 6 months ago
Question answered by JamesGearhead
User's contributor status: Top 10
Question answered 1 year 6 months ago
Answer: It is not necessary, however to get the maximum potential from the exhaust it is recommended.

Question asked by Ricardo07

Question: If my quad is fuel injected will i still have to tune it after installing a slip on hmf
Question asked 1 year 6 months ago
Question answered by TylerGearhead
User's contributor status: Top 25
Question answered 1 year 6 months ago
Answer: Typically not as this is just a slip on but you may find that it pops on deceleration.

Question asked by Kschwen1

Question: Will this slip on fit on HRC header on TRX450R?
Question asked 2 years 10 months ago
Question answered by HMF Engineering
User's contributor status:
Question answered 2 years 10 months ago
Answer: In the past, customers have reported that HMF Slip Ons do fit HRC headers. We have no confirmed this ourselves at HMF, but reports from customers show that it should. The diameter on most of our inlets are 1.5", however, it does vary per system/year.

Question asked by hondatvracer

Question: What would happen if you dont put any inserts in
Question asked Over 3 years ago
Question answered by HMF Engineering
User's contributor status:
Question answered Over 3 years ago
Answer: If the inserts are not ran a large amount of heat is going to be transferred to the turn down. The heat is going to burn off the coating that is applied to the turn down over time.

Question asked by York400ex

Question: If I bought this for my 07 honda trx 400ex all stock do I have to get anything new for it or can I just slip it on?
Question asked Over 3 years ago
Question answered by MotoSportExpert
User's contributor status: Expert MotoSport Staff
Question answered Over 3 years ago
Answer: Normally when installing a slip-on only minor jetting changes are needed, if any at all. If your ATV is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the ATV to see how it is running then tuning your carburetor from there if necessary.

Question asked by raptor350

Question: Will this be a loud exaust for my 09 raptor 350? i want something to really open it up and make it really loud.
Question asked Over 3 years ago
Question answered by MotoSportExpert
User's contributor status: MotoSport Staff Expert
Question answered Over 3 years ago
Answer: The HMF Competition Slip-On Exhaust would be noticeably louder than the stock muffler on your 2009 Yamaha Raptor 350.

Question asked by Atvdude

Question: Do you have to re jet the carb if you get this exhaust
Question asked Over 3 years ago
Question answered by MotoSportExpert
User's contributor status: Expert MotoSport Staff
Question answered Over 3 years ago
Answer: Normally when installing a slip-on only minor jetting changes are needed, if any at all. If your bike is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there if necessary.
Question answered by pimp
User's contributor status:
Question answered Over 3 years ago
Answer: it is recommended to rejet carb or use efi programmer with fuel injection
1 - 10 of 46

Fitment

See all bikes that this part fits...

# Part Numbers

Product Variant Manufacturer Part #
Black 119403606186
Black 141373606186
Black 141403606186
Black 141413606186
Black 119223606186
Black 119243606186
Black 119253606186
Black 119383606186
Black 119393606186
Black 114213606186
Black 126253606186
Black 126263606186
Black 130223706186
Black 136263606186
Black 141333606186
Black 141353606186
Black 141363606186

California Proposition 65

WARNING: This product contains chemicals, including (Glass wool fibers (inhalable and biopersistent)), 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.