Engineered for serious off-road and motocross enthusiasts, the FMF Racing Powercore 4 HEX 042401 slip-on muffler delivers noticeable improvements in both torque and horsepower at a budget-friendly price. Drawing on features from elite racing exhausts, this robust system is crafted with a stainless steel midpipe and endcap combined with an aluminium body. It offers long-term reliability through advanced internal packing and incorporates Hi-Flo core technology for optimised exhaust flow, ensuring your bike performs at its peak.
Features

Substantial increase in power and torque across the RPM range
Durable, race-inspired stainless steel and aluminium construction
Hi-Flo internal core technology for superior airflow
Proprietary Space Age packing maximises longevity
Removable screen-type spark arrestor included for versatility
Compatible with optional quiet insert (sold separately)
Notice: For closed course competition use only

Specifications

Item ID: 042401
Type: Slip-On
Configuration: Single
Material: Aluminium housing with stainless steel midpipe and endcap
Finish: Grey anodised
Spark Arrestor: Screen insert included
Quiet Insert: Sold separately
Carb Warning: No

Vehicle Fitment
Kawasaki

KX450F (2024–2025)
KX450X (2024–2025)

Engineered for serious off-road and motocross enthusiasts, the FMF Racing Powercore 4 HEX 042401 slip-on muffler delivers noticeable improvements in both torque and horsepower at a budget-friendly price. Drawing on features from elite racing exhausts, this robust system is crafted with a stainless steel midpipe and endcap combined with an aluminium body. It offers long-term reliability through advanced internal packing and incorporates Hi-Flo core technology for optimised exhaust flow, ensuring your bike performs at its peak.
Features

Substantial increase in power and torque across the RPM range
Durable, race-inspired stainless steel and aluminium construction
Hi-Flo internal core technology for superior airflow
Proprietary Space Age packing maximises longevity
Removable screen-type spark arrestor included for versatility
Compatible with optional quiet insert (sold separately)
Notice: For closed course competition use only

Specifications

Item ID: 042401
Type: Slip-On
Configuration: Single
Material: Aluminium housing with stainless steel midpipe and endcap
Finish: Grey anodised
Spark Arrestor: Screen insert included
Quiet Insert: Sold separately
Carb Warning: No

Vehicle Fitment
Kawasaki

KX450F (2024–2025)
KX450X (2024–2025)

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