FMF Racing® 042387 - Q4 HEX™ Aluminum Muffler with Spark Arrestor

4 reviews|Item # mpn4714125350
Missing Fitment Information
Fitment notes:
  • Fitment data unavailable. Compatibility is not guaranteed. Please purchase by part number only.
Notes:
  • Remember to check your local or state laws regarding vehicle noise restrictions
  • This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. Shipping Restriction: CA, NY, ME
Authorized Dealer
$359.99
In Stock (12)
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Vehicle Fitment

Information is not available

Specifications

Finish
Aluminum

Includes

  • slip-on muffler screen insert

Product Details

Q4 HEX™ Aluminum Muffler with Spark Arrestor by FMF Racing®. When designing the PowerCore 4 HEX, FMF looked at top of the line FMF-products to deliver race-inspired performance at an economical price. The end result is a quality muffler with improved torque, increased horsepower and rugged durability all at a price that won't break the bank.

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FMF Racing® - CatalogFMF Racing® - FAQMade In USAFMF Racing Authorized Dealer
Brand:
FMF Racing
Part Number:
042387

Reviews

(4)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
/5
1-4 of 4 Reviews
5 of 5
Sounds Perfect! Five Stars
I’m very pleased with the results. Installed this muffler without any problems. It fits exactly as described and provides a slight increase in top-end speed. And yes, it sounds really nice. Loud but not annoying. Just what I wanted!
FMF Racing® - Powercore 4™ Slip-On Muffler
Posted by James (Fort Worth, TX) / June 04, 20202018 Yamaha YFZ450R
5 of 5
Nice Product, Works As Described
What a nice exhaust! Very easy to install. Everybody can do it in less than 15 minutes. Looks stunning and gives a slight increase in performance. The sound is miraculous. It makes heads turn when I pass by.
FMF Racing® - Factory 4.1 SL™ 4-Stroke Silencer
Posted by Barbara (Minotola, NJ) / March 03, 20202005 Yamaha YFZ450
5 of 5
High-Performance Exhaust
This exhaust is shorter and lighter than my original muffler, and sits closer to the engine. My YFZ450R breathes easier with this exhaust, resulting in a significant power boost, especially at higher RPMs. And yeah, the carbon-fiber exhaust cap looks really cool.
FMF Racing® - Factory 4.1 RCT™ Slip-On Muffler
Posted by Kathleen (Washington Dc., DC) / May 06, 20192011 Yamaha YFZ450R
5 of 5
Moderate Sound and Performance
Easy-to-install product with a bit more powerful sound at low RPMs. Expected it to sound more aggressive at higher RPMs. Pleased with its finish and look.
Posted by Wali (Warr Acres, OK) / April 06, 20192018 Suzuki RMZ450

Questions and Answers

(0)
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