Moto-House MX
FMF Powercore 4 Hex Slip-On Muffler 045666 - Beta 350 / 390 / 430 / 480 RR 2020-2026
FMF Powercore 4 Hex Slip-On Muffler 045666 - Beta 350 / 390 / 430 / 480 RR 2020-2026
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FMF Powercore 4 Hex Slip-On Muffler 045666 - Beta 350 / 390 / 430 / 480 RR 2020-2026
Product Description
The FMF Powercore 4 Hex Slip-On Muffler features a Hi-Flo end cap engineered to boost all-around performance across your machine's power band. It is computer-designed and dyno-tested for individual 4-stroke applications to ensure maximum efficiency.
Enhanced sonic evacuation delivers a higher flow of exhaust gases to increase power, while a stainless steel mid-pipe mates to the computer-designed rear can for lightweight durability. Round perforated steel inner cores provide optimum flow using hi-flo technology, complemented by FMF's exclusive cross-weave internal packing for longevity and sound dispersion.
Top Features: FMF Powercore 4 Hex
- Hi-Flo end cap boosts all-around performance.
- Computer-designed and dyno-tested for every 4-stroke application[cite: 1].
- Enhanced sonic evacuation delivers a higher flow of exhaust gases, which increases power[cite: 1].
- Stainless steel mid-pipe mates to the computer-designed rear can for lightweight durability[cite: 1].
- Round perforated steel inner cores make for optimum flow, using hi-flo technology[cite: 1].
Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.
Fitment List
| Year Range | Vehicle Brand | Vehicle Model & Sub-Model |
|---|---|---|
| 2026 | Beta | 390 RR Race Edition 4T |
| 2025-2026 | Beta | 350 RR X-Pro |
| 2025-2026 | Beta | 390 RR X-Pro |
| 2025-2026 | Beta | 430 RR X-Pro |
| 2025-2026 | Beta | 480 RR X-Pro |
| 2024 | Beta | 350 RR S 4T |
| 2024 | Beta | 390 RR S 4T |
| 2024 | Beta | 430 RR S 4T |
| 2021, 2025 | Beta | 350 RR 4T |
| 2021, 2025 | Beta | 390 RR 4T |
| 2021, 2025 | Beta | 430 RR 4T |
| 2021, 2025 | Beta | 480 RR 4T |
| 2020-2026 | Beta | 350 RR-Race Edition |
| 2020-2026 | Beta | 390 RR-Race Edition |
| 2020-2026 | Beta | 430 RR-Race Edition |
| 2020-2026 | Beta | 480 RR-Race Edition |
| 2020-2023 | Beta | 350 RR-S |
| 2020-2023 | Beta | 390 RR-S |
| 2020-2023 | Beta | 430 RR-S |
| 2020, 2023-2024 | Beta | 350 RR |
| 2020, 2023-2024 | Beta | 390 RR |
| 2020, 2023-2024 | Beta | 430 RR |
| 2020, 2023-2024 | Beta | 480 RR |
Frequently Asked Questions
Q: What materials are used to construct the Powercore 4 Hex slip-on?
A: It features an elliptical aluminum can, a stainless steel mid-pipe, and a stainless steel end cap with round perforated steel inner cores[cite: 1].
Q: Is this exhaust intended for closed course competition?
A: Yes, it is designated for closed course competition use only[cite: 1].
Expert Pro-Tip
Expert Pro-Tip: Apply a light coat of high-temperature silicone at the slip-joint connection during installation to create a perfect seal against exhaust leaks. Ensure that all mounting hardware is tightened evenly to account for vibration on high-output 4-stroke engines.
Recommended Pairings:
- Beta 350 RR Performance Parts & Accessories
- Beta 4-Stroke Performance Parts
- Motorcycle Tools & Accessories
About Moto-House MX
At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. We pride ourselves on great customer service, and every item ships FAST - straight to your door.
Moto-House MX - Choice of Champions - Your premier powersports source with great customer service and lightning-fast shipping straight to your door.
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