This is a digital tuning credit, not a physical part. xHP is a third-party tuning solution that flashes the ZF 6HP/8HP automatic transmission control unit to improve shift speed, launch control, throttle response, and torque limits; a "1 Credit" purchase authorizes one such transmission flash, typically performed alongside or independently of a Bootmod3/xHP ECU tune. Providers such as Hack Engineering sell this exact credit as "xHP BMW Transmission Tune (ZF 6HP/8HP/7-speed DCT)" and perform the flash remotely using the xHP Pro dealer tool.