Powercore 4 Slip-On Muffler

The FMF Powercore 4 Slip-On Muffler is a proven performance upgrade for 4-stroke off-road bikes, designed to increase exhaust gas flow for stronger power delivery. Its computer-designed and dyno-tested construction helps your engine breathe more efficiently, improving overall response while keeping the setup lightweight and durable for track and trail use.

If you want an exhaust that’s built to last and delivers real gains without the complexity of a full system, the Powercore 4 slip-on is an ideal solution. With FMF’s internal packing designed for longevity and maximum sound dispersion, plus the option to add a Quiet Core insert, you can tailor the setup to your riding needs.

Key features:

• ✅ Hi-Flo end cap boosts all-around performance
• ✅ Enhanced sonic evacuation increases exhaust flow for more power
• ✅ Round perforated steel inner core for optimum flow (hi-flo technology)
• ✅ FMF cross-weave internal packing for longevity and effective sound dispersion
• ✅ Elliptical aluminum canister for strategic sizing and performance
• ✅ Includes removable spark arrestor
• ✅ Optional Quiet Core insert available to reduce sound level

Benefits of using it:

• 🔹 More efficient exhaust flow for improved power and rideability
• 🔹 Durable, lightweight construction (stainless mid-pipe + aluminum muffler)
• 🔹 Ride-ready practicality with a removable spark arrestor and optional quieter insert

Technical specifications:

• 📌 Brand/Model: FMF Powercore 4
• 📌 Type: Slip-On muffler
• 📌 Muffler material: Aluminum
• 📌 Mid-pipe material: Stainless steel
• 📌 End cap material: Stainless steel
• 📌 Vendor part number: 042392
• 📌 Note: Will not pass 2025 FIM sound regulation

Why choose this product?

• ⭐ Designed and dyno-tested specifically for 4-stroke applications
• ⭐ Built with quality materials for long-term off-road durability
• ⭐ A trusted FMF slip-on that balances performance, weight and serviceability