Exhaust Header FMF MegaBomb — Yamaha WR 450 F, YZ 450 F, YZ 450 FX 2019–2020 (4T)

Description

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. MATERIAL: this part number is made of STAINLESS STEEL, not titanium — FMF makes the Ti-Metal titanium version as a separate part with its own number. The blue-gold discolouration around the welds is natural on stainless steel and is not a defect. Fits: Yamaha WR 450 F (2019–2020); Yamaha YZ 450 F (2018–2019); Yamaha YZ 450 FX (2019–2020). Specifications — material: Stainless Steel, configuration: 1-Into-1 System. 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: 044439.