Billet Performance Products 14mm base injector adapter converts the base of extended-tip Bosch injectors to a standard 3/4-length style for custom EFI fuel system work. It is used when injector selection, rail height and manifold fitment do not naturally line up, which is common on performance builds mixing aftermarket rails, manifolds and injector bodies. Instead of fighting the hardware, this adapter helps you create a more correct and serviceable installation. That makes it a worthwhile part for tuners and workshops building reliable street, drag or drift fuel systems. FEATURES MPN: BPP0032-1 Base size: 14mm Function: Converts extended-tip Bosch injectors to standard 3/4 length Use case: Corrects injector base fitment in custom EFI combinations Construction: Precision-machined adapter for performance fuel systems TYPICAL APPLICATIONS Aftermarket EFI fuel rail conversions Injector upgrades using extended-tip Bosch injectors Street, drag and drift fuel system builds Workshop fixes for injector base and rail mismatch FITMENT NOTES Designed around a 14mm injector base arrangement Always confirm injector dimensions, seal style and target installed length before ordering Intended for custom EFI applications rather than untouched OE injector layouts Works best when combined with the correct rail, seat and injector hardware for the build