The FMF PowerCore 4 HEX Muffler, manufacturer part number 042409 and vendor part number 79-042409, is designed to deliver race-inspired exhaust performance for select Kawasaki KX250F and KX250X models. Its performance-focused design helps improve overall horsepower and torque while providing the rugged durability needed for demanding motocross and off-road riding.
Constructed from durable stainless steel and aluminum, the FMF PowerCore 4 HEX Muffler combines lightweight materials with long-lasting performance. Its Hi-Flo internal core promotes efficient exhaust flow, while enhanced sonic evacuation supports increased power delivery. Space Age internal packing material is engineered for extended service life, helping the muffler maintain consistent performance over time.
This FMF muffler includes a removable spark arrestor and can be used with either an FMF header or the stock OEM header. It is a direct-fit performance exhaust component for the 2025 Kawasaki KX250F, 2025 Kawasaki KX250X, 2026 Kawasaki KX250F, and 2026 Kawasaki KX250X. Verify your motorcycle model and year before installation to ensure proper fitment.
Features:
- Performance: Designed to provide an overall increase in horsepower and torque.
- Construction: Durable stainless steel and aluminum materials support reliable use in demanding riding conditions.
- Packing: Space Age internal packing material helps maximize service life.
- Core Design: Hi-Flo technology promotes efficient exhaust flow.
- Exhaust Flow: Enhanced sonic evacuation supports higher flow and increased power.
- Spark Arrestor: Includes a removable spark arrestor.
- Header Compatibility: Can be used with an FMF header or the stock OEM header.
- Fitment: Fits 2025 Kawasaki KX250F, 2025 Kawasaki KX250X, 2026 Kawasaki KX250F, and 2026 Kawasaki KX250X.
Fitment:
2025 Kawasaki KX250F
2025 Kawasaki KX250X
2026 Kawasaki KX250F
2026 Kawasaki KX250X