Billet Performance Products Evo 4-9 fuel rail kit is a direct bolt-on billet rail for Mitsubishi 4G63 engines running 14mm top-feed injectors. It is aimed at builds that have outgrown the factory rail and need a more serious EFI foundation for larger injectors, braided hose, AN plumbing and aftermarket ECU tuning. In a real workshop context, this is the sort of rail you fit when the fuel system is being upgraded to match power goals rather than patched together. The kit uses a CNC-machined billet rail with a generous internal bore and is supplied with injector adaptors and mounting hardware. Colour variants listed on this product let you match the rail to the rest of the engine bay. FEATURES MPN: BPP8015 Fitment: Mitsubishi Lancer Evolution 4-9 4G63 Injector style: 14mm top-feed injectors Construction: CNC-machined 6061-T6 billet aluminium Rail bore: 16mm internal bore Included: Injector adaptors and mounting hardware Finish: Type II bright dip anodised finish TYPICAL APPLICATIONS Mitsubishi Evo 4-9 fuel system upgrades E85 and high-flow injector conversions Street, drag and time attack 4G63 builds Aftermarket ECU packages using larger top-feed injectors FITMENT NOTES Suits Mitsubishi Evo 4-9 4G63 engines Designed for 14mm top-feed injectors Confirm injector length, fuel line routing and regulator layout before installation Best results come when the rest of the fuel system is sized to the engine’s power target