Miata to BMW E46 ZF 6-Speed Transmission Adapter Package

This package adapts a BMW E46 ZF 6-speed transmission to an NA or NB Miata, with either a Honda K series engine, or the factory Mazda BP engine. It's designed to provide customers with high horsepower turbocharged builds with a very stout transmission option with similar gear ratios to the Miata 6-speed. Because of the similar gearing, this transmission option can also be paired with the a factory Miata 1.8 Torsen differential with our required PPF delete package. New for 2025: Our new 3.5" aluminum driveshaft features larger diameter splines machined to ultra-tight tolerances, eliminating the slop sometimes found in older steel shafts with smaller splines. This design ensures consistent smooth power delivery, improved durability, and vibration-free operation even at high speeds, having been thoroughly tested to 150+ mph on the racetrack. All parts included are proudly made in the USA. Lead times for shipment vary, always reference our Current Lead Times page for up to date timeline fo