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.
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FMF MPN 045698 2020s Triumph Ti Megabomb Header
Regular price $451.24 USDRegular price$474.99 USDSale price $451.24 USDSale -
FMF Megabomb Head Pipe (Titanium) 045693 - Triumph TF 250-C / TF 250-E / TF 250-X 2024-2026
Regular price $451.24 USDRegular price$474.99 USDSale price $451.24 USDSold out -
FMF Megabomb Header Pipe 041607 - Honda CRF250R 2022-2024
Regular price $451.24 USDRegular price$474.99 USDSale price $451.24 USDSale -
FMF Q4 Slip-On Muffler 041287 - Honda CRF150R 2007-2026
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Slip-On Muffler (Oval/Raw Aluminum) 041249 - Honda CRF250R / CRF250X 2004-2016
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Slip-On Muffler (Aluminum/Stainless Steel) 043377 - Kawasaki KLX400 / Suzuki DR-Z400 2000-2022
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Hex Slip-On Muffler (Raw Aluminum) 042410 - Kawasaki KX250 / KX250X 2025-2026
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSold out -
FMF Q4 Hex Slip-On Muffler (Aluminum/Stainless Steel) 045590 - Husqvarna / KTM 250cc-501cc 2016-2017
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Hex Slip-On Muffler (Aluminum/Stainless Steel) 044442 - Yamaha YZ450F / WR450F / YZ450FX 2018-2026
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Hex Slip-On Muffler (Aluminum/Stainless Steel) 044452 - Yamaha YZ250F / WR250F / YZ250FX 2019-2026
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Slip-On Muffler (Aluminum/Stainless Steel, Slash-Cut) 043380 - Suzuki DR650SE 1997-2022
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Slip-On Muffler (Aluminum/Stainless Steel) 044301 - Yamaha YFZ450R / YFZ450X 2009-2026
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Slip-On Muffler (Aluminum/Stainless Steel) 044210 - Yamaha YFZ450 2004-2009 / 2012-2013
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Slip-On Muffler 044199 - Yamaha WR450F / YZ450F 2003-2006
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Hex Slip-On Muffler 045646 - Gas Gas / Husqvarna / KTM 2020-2023
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale -
FMF Q4 Hex Slip-On Muffler (Raw Aluminum) 042388 - Kawasaki KLX300R 2020-2021
Regular price $449.99 USDRegular price$499.99 USDSale price $449.99 USDSale