FMF Racing Beta 350/390/430/480RR 20-25 Hex Q4 S/A Muffler

A 4-Stroke header system that incorporates FMF's patented Power Bomb module at a precise location in the initial stage of the header system; by positioning the "Bomb" at this key point, the expansion and contraction of exhaust sonics through the system resulting in a flow increase of nearly 10%. The surface of the perforated core lets the sound exit into the absorbing material (steel wool packing) and then allows the air to expand, cool and ramp back up at higher air pressures (RPMs). The Power Bomb is a "pre-muffler" of sorts, which helps to lower the bike's sound output because it provides more sound-absorbing surface area to allow the exhaust gases to become absorbed.

This Part Fits:

Year	Make	Model	Submodel
2020,2023-2024	Beta	350 RR	Base
2025	Beta	350 RR X-Pro	Base
2020-2025	Beta	350 RR-Race Edition	Base
2020-2023	Beta	350 RR-S	Base
2020,2023-2024	Beta	390 RR	Base
2025	Beta	390 RR X-Pro	Base
2020-2025	Beta	390 RR-Race Edition	Base
2020-2023	Beta	390 RR-S	Base
2020,2023-2024	Beta	430 RR	Base
2025	Beta	430 RR X-Pro	Base
2020-2025	Beta	430 RR-Race Edition	Base
2020-2023	Beta	430 RR-S	Base
2020,2023-2024	Beta	480 RR	Base
2025	Beta	480 RR X-Pro	Base
2020-2025	Beta	480 RR-Race Edition	Base