Exhaust Header FMF PowerBomb — Yamaha YFZ 450, YZ 450 F, WR 450 F 2004–2014 (4T)

The FMF PowerBomb is a four-stroke header with FMF's patented chamber placed right at the start, just behind the head. The expansion and contraction of the gases at that point increases flow — power can rise by as much as 10%. The chamber also works as a pre-muffler and helps bring the system's sound output down. Fits: Yamaha YFZ 450 (2004–2009, 2012–2014); Yamaha YZ 450 F (2003–2006); Yamaha WR 450 F (2003–2006). Specifications — material: Stainless Steel, finish: Natural. Note: does not meet the 2025 FIM sound limit — intended for practice and closed courses, not for FIM-sanctioned racing. Delivery 5–8 working days. SKU: 044033.