Delivering race-inspired performance with exceptional value, the FMF Racing Powercore 4 HEX 044441 slip-on muffler offers noticeable gains in both torque and horsepower, all housed within a rugged, lightweight aluminium and stainless steel package. Utilising advanced Hi-Flo core technology and premium packing materials, it’s engineered for maximum durability and performance, making it an ideal upgrade for riders seeking reliability and a competitive edge without compromising budget.

Features

• Overall improvement in power and torque


• Durable stainless steel and aluminium construction


• Hi-Flo core design for enhanced exhaust flow


• Space Age internal packing material for extended longevity


• Enhanced sonic evacuation for increased power output


• Includes removable spark arrestor (screen insert)


• Lightweight design at just 5.3 lbs


• Natural finish for a sleek appearance


• Closed course use only

Specifications

• Item ID: 044441


• Type: Slip-On


• Configuration: Single


• Construction: Aluminium


• Finish: Natural


• Midpipe: Stainless steel


• Endcap: Stainless steel


• Spark Arrestor: Screen insert (included)


• Quiet Insert: Sold separately


• Weight: 5.3 lbs


• Carb Warning: No

Vehicle Fitment

Yamaha

• WR450F (2019–2024)


• YZ450F (2018–2026)


• YZ450FX (2019–2025)