Billet Performance Products injector to plenum adapter gives Toyota 1JZ and 2JZ builds a clean, sealed way to mount injectors into the manifold side of a custom EFI setup. It is the sort of part used when you are combining aftermarket fuel rails, different injector bodies and custom intake hardware, and you want the injector to seat properly instead of relying on makeshift spacers or mismatched seals. That matters on any engine build where fuel control and leak prevention are non-negotiable. For street, drift and drag JZ projects, this adapter works naturally alongside upgraded rails, injector hardware and ECU-driven fuel system packages. FEATURES MPN: BPP1503 Engine fitment: Toyota 1JZ and 2JZ Injector fitment: Suits injectors with a 14mm lower O-ring Seal: Integrated O-ring for a leak-free connection Finish: Black anodised Manufacture: Made in Australia TYPICAL APPLICATIONS Toyota JZ custom EFI and fuel rail upgrades Aftermarket plenum and manifold conversions Street, drift and drag engine builds using larger injectors Workshop fuel system fabrication where injector seating must be correct FITMENT NOTES Designed for Toyota 1JZ and 2JZ engine platforms Requires injectors with a 14mm lower O-ring Always confirm manifold, injector and rail geometry before final assembly A strong match for Billet Performance Products fuel rails and related JZ fuel system hardware