My 04' TRX450R install took 5 minutes. Instant power increase all through the power curve. Noticeably louder throatier sound to it.
HMF Performance Series Slip-On Exhaust
- 66 Reviews
- 65 Questions
Setting the standard for power and value, the HMF Performance Series has been track tested with over a decade of championships. The specially designed, unrestricted core provides maximum flow and allows the exhaust to increase horse power and torque evenly throughout the entire power curve. The trademark to the HMF Performance Series is the exhaust's sound. With a deep, aggressive sound, you'll typically see a 2 - 10 dB increase from the stock exhaust system.
- Powersports slip-on.
- Designed for 4-stroke sport quads.
- T-6061 aerospace-grade aluminum canisters.
- TIG welded aluminum brackets.
- Heavy-duty stainless steel rivets.
- Two-piece billet end caps that accept a U.S.F.S.-approved spark arrestor (included) and the exclusive HMF quick-change low dB Quiet Core (sold separately).
- Packed with Bristol Core brand pillow packing.
- Hardware included.
- Sold as a kit.
- Includes installation instructions.
- Two-year manufacturer's warranty.
- Manufactured in the U.S.A.
- Note: HMF Exhausts are designed for closed course competition only.
Equal Power: The Performance Series distributes power evenly throughout the entire RPM range.
2 - 10 dB Increase: Depending on the model, you can expect a 2 - 10 dB increase over stock.
Unrestricted Core: The Performance Series uses a 2-1/8" non-restrictive core for maximum flow.
Less Weight: The exhaust shell is made of T6061 Aluminum that weighs substantially less than stock.
This pipe is amazing my Yamaha raptor 700 even shoots flames
Easy install. 20 minutes, and instant power gains from bottom to top. Took longer to get tools out than install.
Great sound! Point blank it has the loud that you are looking for. It will stir up dust 15 ft behind you, I rate this with top exhausts, I have a full yoshimura exhaust on my 660 raptor and it does not sound as deep as this hmf puts out, plus you can buy a quit core that brings it down but it can't keep that pipe quit.. Lol great buy, didn't have to rejet on the 400x.
Ordered this pipe for my wife's 2006 trx450er with the power core insert 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."
this exhaust is great for all types of riding!it adds a lot of power and the sound is just unbeatable!i highly recomend this product to anyone who is looking for a cheap powerful exhaust
HMF Performance Series Slip-On Exhaust is good it increase the power a lot
This was very easy to install got more power and a great sound would recommend to anyone.
put on a 660 raptor sounds good. will update when i re pack it.
I put this exhaust on my kfx 400 it definitely has noticable power change and it's also very loud, also I recommend getting a CDI box. no regrets on this at all.
Great Pipe.. Noticable difference in mid to high range rpm's, nice pull. Fast installation perfect fit... Had to up my main jet to a 168. Pipe brought the quad to life, sounds tuff... Buy it!!
great looking pipe, easy to install but the bolts that they send with the pipe are too short so keep your factory ones for an easier install. Sounds awesome loud deep growl, seems to help with throttle response a little. But overall great pipe and well worth the money.
I love this pipe, put it on in 10 minutes and sounds great. Realy deep and loud and gives you a boost you can feel. Ive had it for one day and already got stopped from complaints about noise. You dont have to jet your carb. with this pipe but good idea to do it anyways
pretty good pipe but it is extremely loud and there are alot of parks that have a decibal requirement and even with the quiet core its still to loud. If i were to buy a another pipe it would be the big gun eco system they sound great and you can still ride where ever you want. And i didnt really notice a difference in power just noise.
love it! sounds as good as full system. very loud,worth the money i would tell anyone this is a best buy. around 100 db's adds some power. fairly easy to install.
Sounds like a BEAST!
I love this muffler! i have had it for a while now and havent noticed anything bad about it. It has a great sound to it, very loud when you get on it. as soon as i put it on and rode with it i noticed the power that i got from it. Also it was very east to install. i just took the old one off and slipped this one on and changed the jetting and was good to go! i would tell any one who was looking at this muffler to get it!
i just got this pipe the other day and it sounds amazing!!!! i never thought it would be so loud and it give it more umpth if you know what i mean
I have a 1998 Yamaha Warrior 350 ATV, this slip on fit perfect, it looks great and sounds awesome, gave me some extra boost and it was easy to install. HMF is a great product, you wont be disappointed. Motosports ships fast too and the price is right.
i just installed hmf on my ltz400 and let me tell you. This exhaust is amazing. It looks and sounds awsome. It has a nice deep throaty sound and is very loud. I would definetly recommend this exhaust to anyone
They will also need to know what model machine you have.
The Performance exhaust is by default going to come in a brushed aluminum with a turn down brushed tip. It features a straight through core which has good horsepower and torque gains but not quite as much as our competition series TRI-MAX core. It is the only exhaust series that allows for color customization as well as a variety of 3 types of tips to choose from that are completely aesthetic and add no power to the system. Performance adds nice power gains for a lesser price than the competition.
Both exhausts are constructed from aluminum, featuring different cores internally.