FMF PowerCore 4 Full Exhaust System

Item Number: 327252


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Product Description

FMF Racing

FMF PowerCore 4 Full Exhaust System

FMF developed the PowerCore4 to increase the horsepower and torque throughout the entire RPM range. Not only does it produce a noticeable power increase that is useable and compatible with every style of riding, but it also delivers improved throttle response. Each muffler features an aluminum sleeve that's mated to a stainless steel Hi-Flo endcap for the perfect balance of performance and strength.

  • Aluminum performance muffler mated to a durable stainless steel header
  • Stainless steel header with better flow over the stock design for improved throttle response and greater engine power output, especially at low RPMs
  • Removable USFS-approved spark arrestor in each muffler
  • Space-age muffler packing for maximum packing life
  • Hi-Flo modular end cap
  • Enhanced sonic evacuation provides for higher flow and increased power
  • Made in the USA

Spec Details
Color Champagne
Configuration Varies (make selection above)
Country of Origin USA
Finish Anodized
Header Varies (make selection above)
Header Construction Varies (make selection above)
Mid-Pipe Varies (make selection above)
Muffler End Cap Stainless Steel
Muffler Sleeve Aluminum
USFS Spark Arrestor Yes

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.


  • TRX90EX FourTrax 90 2007-2008
  • TRX90X FourTrax 90 2009, 2013-2014
  • TRX250X FourTrax 250X 1987-1988, 1991
  • TRX300EX FourTrax 300EX 1993-2000, 2004-2007
  • TRX300EX Sportrax 300EX 2001-2003, 2008
  • TRX300X Sportrax 300X 2009


  • KFX50 2008-2009
  • KFX90 2008-2010
  • KSV700A KFX700 V-Force 2004-2009


  • LT-Z50 QuadSport 50 2007-2009


  • YFM80 Raptor 80 2002-2008
  • YFM80G Grizzly 80 2008

Customer Reviews

Questions & Answers

  • Does this include the header?

    By: Guest

    Yes, all FMF Power Core 4 Full Exhaust Systems come with stainless steel headers.

    By: Staff

  • Does it require rejetting

    By: Aaron J.

    While it's not required, we highly recommend that you rejet your machine so as to get the best possible throttle response and engine power output. FMF even makes a jet kit that's perfectly matched to go along with their exhausts in the form of the FMF Power Up Jet Kit. With that, you'll get everything you need and the included instructions do an excellent job of explaining how to tune your bike for maximum benefit.

    By: Staff