Billet Performance Products injector to plenum adapter gives Nissan S13 SR20DET builds the correct injector seat when moving to custom EFI hardware. It is intended for setups that use injectors with a 14mm lower O-ring and need a proper manifold-side seal rather than an improvised solution. When you are piecing together a fuel rail, manifold and injector combination for an SR20, small parts like this are what make the difference between a clean installation and ongoing fuel leaks or alignment issues. It suits street, drift and track SR20 builds that are stepping up injector size, updating the rail or refreshing the manifold hardware during an engine build. FEATURES MPN: BPP2504 Engine fitment: Nissan S13 SR20DET Injector fitment: Suits injectors with a 14mm lower O-ring Seal: Integrated O-ring for a secure, leak-free connection Finish: Black anodised Manufacture: Made in Australia TYPICAL APPLICATIONS Nissan S13 SR20DET fuel system upgrades Custom EFI rail and plenum conversions Street, drift and circuit SR20 engine builds Injector upgrades where correct manifold-side fitment is required FITMENT NOTES Designed specifically for Nissan S13 SR20DET applications Requires injectors with a 14mm lower O-ring Check plenum bore, injector length and rail alignment before installation Best suited to custom EFI arrangements rather than untouched factory side-feed systems