BMW 8HP AWD to RWD Conversion Kit | HPR Ultraflex

A complete, high-quality solution for converting 8HP BMW AWD transmissions (8HP70X and related variants) to a RWD configuration.

The HPR 8HP AWD to RWD Conversion Kit is engineered with practicality and performance in mind.

Unlike many alternatives on the market that require modification or clearancing to fit within the transmission tunnel, this kit features a compact design with repositioned outer mounting point on the left side. This ensures improved clearance and a straightforward installation.

In addition to the conversion components, the kit includes our full UltraFlex rear mount system. This comprises durable bobbin mounts (Shore 60A) along with all necessary hardware, delivering excellent vibration control and drivetrain stability. The UltraFlex mount is also fully compatible with all HPR chassis-specific crossmembers, ensuring seamless integration across a wide range of builds.

The flat-profile bobbin mounts in the Ultraflex kit simplify custom crossmember fabrication, saving time while ensuring precise fitment.

The UltraFlex mount adjustability makes it easy to precisely dial in your drivetrain angles, which is critical for a successful swap without any vibration/NVH issues.

The assembly can be adjusted from 112mm to 168mm from the centerline of the output shaft to the bottom of the rubber mount, making it the most flexible rwd adaptor on the market.

(See the HPR Pro Tip in the installation guidelines for more details.)

Designed to offer both flexibility and value, this package combines premium engineering with competitive pricing, making it one of the best-value solutions available.

See Installation Guideline

Confirmed Fitment:

8HP70X N57 (1st Gen)
8HP70X N63 (1st Gen)
8HP50 B48 / B58 (2nd Gen)
8HP75X B57 (2nd Gen)
8HP70X N63 (2nd Gen)
8HP51 B58 (3rd Gen)
8HP76X B57 (3rd Gen)
8HP76X S58 (3rd Gen)
8HP90/95X N73 / N74 (2nd Gen)

Kit Includes:

BMW 8HP AWD to RWD Adapter
HPR 1350 Output Flange (pre-assembled with high-speed bearing)
UltraFlex Rear Mount
Bobbin Mounts (Shore 60A)
Complete Bolt & Hardware Kit

Note:
Requires a small modification to the transmission housing. Please refer to the installation guidelines and video for further details.

8HP Accessories

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