Exhaust Header FMF MegaBomb — Yamaha YZ 450 F, WR 450 F, YZ 450 FX 2023–2025 (4T)

The FMF MegaBomb is a four-stroke header with an expanded chamber right behind the head. It gives you the bottom end of a long header and the top end of a short one — which on a conventional header are mutually exclusive. The chamber also acts as a pre-muffler, cutting sound output by around 1.5 dB and working well with quieter silencers. The shorter build is less vulnerable in the terrain than a long header. The Ti-Metal version is titanium. Fits: Yamaha YZ 450 F (2023–2025); Yamaha WR 450 F (2024–2026); Yamaha YZ 450 FX (2024–2026). Specifications — material: Stainless Steel. 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: 044475.