Collection: FMF Factory 4.1 RCT, Megabomb, Powerbomb, Powercore 4, & Q4 4-Stroke Performance Exhaust – Moto-House MX
FMF 4-Stroke Performance Exhaust Systems, Mufflers, and Headers | Moto-House MX
At Moto-House MX, we are the go-to destination for performance parts, performance kits, and accessories for the FMF 4-Stroke exhaust lineup. With over 40 years of expertise in optimizing motocross and off-road bikes, our experienced team is dedicated to helping you take your FMF 4-Stroke vehicle setup to the next level.
The FMF 4-Stroke collection delivers the ultimate upgrade to improve performance on 4-stroke motorcycles, dirt bikes, enduro bikes, ATVs, and pit bikes, maximizing horsepower and torque across the entire RPM range. Our collection features top-tier hardware from FMF Racing — providing everything you need to fine-tune your bike's performance.
FMF 4-Stroke Mufflers & Headers Lineup
- Factory 4.1 RCT: FMF’s elite flagship muffler delivering massive power gains, crisp throttle response, and weight reduction.
- Powercore 4: High-end track and trail performance, incredible horsepower, and rugged durability without a premium price.
- Q4 Silencer: Engineered to meet strict off-road sound restrictions on public lands without choking out horsepower.
- Megabomb Header: Patented design mimicking a long header's low-end pull with a short header's top-end scream.
- Powerbomb Header: Uses a unique expansion module to increase exhaust flow and deliver a major mid-range torque boost.
Whether you're looking to boost engine power, improve handling, or enhance overall reliability, Moto-House MX has the performance parts and accessories you need. Our selection of FMF 4-Stroke upgrades ensures that your bike stays ahead of the competition on every ride.
The FMF 4-Stroke exhaust line optimizes performance on common machinery like the KTM 250SX, KTM 450SX, KTM 450EXC, Beta 480 RR, Yamaha YZ450F, Honda CRF250R, and Kawasaki KX450. This premium lineup competes directly with exhaust systems from brands like Pro Circuit and Yoshimura. Our performance packages are designed to keep your FMF 4-Stroke running out front of the competition while staying reliable and budget-friendly.
Shop trusted setups from FMF Racing — all available with fast shipping from our Central Florida location.
Explore our full collection of FMF 4-Stroke performance kits, parts, and accessories today and elevate your bike's performance with Moto-House MX.
Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. We are the best shop in Central Florida with lightning-fast shipping.
-
FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap - 042292 - 2012-2015 Kawasaki KX450F
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSold out -
FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap - 042291 - 2009-2011 Kawasaki KX450F
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSold out -
FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap - 042290 - 2009-2016 Kawasaki KX250F
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSold out -
FMF Factory 4.1 RCT Slip-On Muffler (Aluminum/Carbon Fiber) 043364 - Suzuki RM-Z450 2018-2026
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSale -
FMF Aluminum Factory 4.1 RCT - 043372 - (Slip-On) Carbon Fiber End Cap 2019-2023 Suzuki RM-Z250
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSold out -
FMF Factory 4.1 RCT Slip-On Muffler (Aluminum / Stainless Steel) 042330 - Kawasaki KX450F 2016-2017
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSold out -
FMF Factory 4.1 RCT Slip-On Muffler 042374 — Kawasaki KX250 2019-2020
Regular price $539.99 USDRegular price$599.99 USDSale price $539.99 USDSale -
FMF Megabomb Head Pipe with Mid Pipe (Titanium) 044459 - Yamaha YZ450F / YZ450FX 2019-2023
Regular price $498.74 USDRegular price$524.99 USDSale price $498.74 USDSale -
FMF Megabomb Head Pipe with Mid Pipe (Titanium) 044450 - Yamaha YZ250F / YZ250FX / WR250F 2019-2026
Regular price $498.74 USDRegular price$524.99 USDSale price $498.74 USDSale -
FMF Megabomb Head Pipe with Mid Pipe (Titanium) 044476 - Yamaha WR450F / YZ450F / YZ450FX 2023-2026
Regular price $498.74 USDRegular price$524.99 USDSale price $498.74 USDSale -
FMF Mini Factory 4.1 Exhaust System 042381 - Kawasaki KLX110 / Suzuki DR-Z110 2003-2026
Regular price $484.49 USDRegular price$509.99 USDSale price $484.49 USDSale -
FMF Q4 Hex Slip-On Muffler (Raw Aluminum) 042402 - Kawasaki KX450 / KX450X 2024-2026
Regular price $474.99 USDRegular price$499.99 USDSale price $474.99 USDSold out -
FMF Q4 Hex Slip-On Muffler (Raw) 041617 - Honda CRF250R / CRF250RX 2025-2026
Regular price $474.99 USDRegular price$499.99 USDSale price $474.99 USDSale -
FMF Q4 HEX Slip-On Muffler 041544 - Honda TRX450R 2004-2014
Regular price $474.99 USDRegular price$499.99 USDSale price $474.99 USDSale -
FMF Q4 Hex Slip-On Muffler 045667 - Beta 350 / 390 / 430 / 480 RR 2020-2026
Regular price $474.99 USDRegular price$499.99 USDSale price $474.99 USDSale -
FMF MegaBomb Head Pipe with Mid Pipe (Stainless Steel) 045661 - KTM 500 XCF-W / Husqvarna FE501 2020-2022
Regular price $472.49 USDRegular price$524.99 USDSale price $472.49 USDSale