When designing the PowerCore 4 HEX, FMF looked at their top of the line 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.

Completely redeveloped, THE POWERCORE 4 now features many of the design and engineering features of FMFs top-of-the-line FACTORY 4.1 exhaust - Factory Forward engineering, durable fixed mount, sleek formed endcaps and removable spark arrestor screen. Although manufactured as a price point muffler, they didn’t cut corners on material. They utilise aircraft grade aluminium for the canister and new fixed mount. High strength stainless steel is used for the formed front and rear endcaps as well as the mandrel bent midpipe.

FEATURES

• Overall increase in power and torque
• Advanced packing material for maximum longevity
• Completely redesigned for all late model applications
• Aluminium performance muffler with durable stainless steel components
• 98dB sound level with 94dB insert available for purchase
• Space Age internal packing material for maximum longevity.
• Internal shape of core uses Hi-Flo technology.
• Enhanced sonic evacuation provides for higher flow and increased power.
• Use with FMF or stock/OEM header
• Removable spark arrestor included
• Easily serviced for repacking

Please note: Image for reference. Correct product will be provided.

SPECIFICATIONS

Notice: Closed Course Use Only
Item ID: 044441
Type: Slip-On
Configuration: Single
Const: Aluminium
Finish: Natural
Midpipe: Stainless Steel
Endcap: Stainless Steel
Spark Arrestor: Screen Insert (included)
Carb Warning: no
Quiet Insert: Quiet Insert (sold separately)
Weight: 5.3 lbs

BIKE FITMENT

YAMAHA

• WR450F 2019-2026
• YZ450F 2018-2026
• YZ450FX 2019-2026