Billet Performance Products Nissan base injector adapter is designed to convert extended-tip Bosch injectors so they suit Nissan-style base sealing and a 3/4-length installed configuration. It is aimed at EFI builds that use Nissan engines such as RB20, RB26 and CA18, where injector choice and manifold geometry do not always line up with the hardware on hand. This adapter gives you a cleaner way to make those parts work together without chasing unreliable home-made spacing solutions. For workshop fuel system builds, it is a practical part to have on hand when stepping into aftermarket injectors, custom rails or older Nissan platforms being converted away from stock arrangements. FEATURES MPN: BPP0034-1 Function: Converts extended-tip Bosch injectors to a Nissan base / 3/4-length arrangement Engine examples: Nissan RB20, RB26 and CA18 Construction: Precision-machined adapter for custom EFI fitment Use case: Helps match injector base sealing to Nissan applications TYPICAL APPLICATIONS RB20, RB26 and CA18 injector upgrades Custom EFI conversions on older Nissan engines Fuel rail and manifold combinations using Bosch injectors Street, drift and drag builds needing Nissan-specific injector fitment FITMENT NOTES Intended for Nissan applications that need a Nissan base seal Used to adapt extended-tip Bosch injectors to a 3/4-length installed height Always confirm injector body style, base seal and rail/manifold dimensions before purchase Best suited to custom EFI systems where injector hardware is being changed from stock