HPR Superior Bellhousing Kit

HPR presents the Superior solution for adapting a ZF 8HP transmission to your Toyota JZ engine. As the true pioneers behind this bellhousing solution, we are proud to introduce a cast version that delivers the same proven HPR design at a more accessible price point.

Designed for the 1JZ and the 2JZ engine, the kit allows direct installation of ZF 8HP70, 8HP75, and 8HP76 automatic transmissions. By replacing the original transmission bellhousing rather than using a conventional adapter plate, the HPR Superior Bellhousing creates a shorter, more compact drivetrain package with improved transmission tunnel clearance—without the need to modify the factory bellhousing for starter clearance.

Manufactured from high-quality A356 cast aluminum and precision CNC machined, the kit combines proven HPR engineering with a more accessible entry point into premium ZF 8HP conversions. It includes a 4340 chromoly steel flexplate with an integrated starter ring gear, along with all hardware required for installation.

The Superior solution—no adapter plate, no corners cut, and no compromises. Premium performance at an accessible price.

What is included in the HPR 8HP Superior Bellhousing Kit?
Every HPR Superior Bellhousing Kit includes all the components required to complete your Toyota JZ to ZF 8HP conversion.

• HPR Superior Cast Bellhousing for Toyota 1JZ / 2JZ
• ZF Roller Bearing pre-installed
• ZF Lock Ring pre-installed
• Front Cover Oil Seal pre-installed
• 4340 Chromoly Flexplate for 1JZ / 2JZ
• Input Shaft Protection Cap
• Converter Inspection Plug
• Bellhousing-to-Engine Hardware
• Bellhousing-to-Transmission Hardware
• Flexplate & Converter Hardware

Why Replace the Bellhousing Instead of Using an Adapter Plate?
The HPR Superior Bellhousing Conversion Kit eliminates the compromises of traditional adapter plate conversions by replacing the original bellhousing. The result is a stronger, more compact solution with improved fitment, easier installation, and OEM-level functionality.

Compact Design: A shorter drivetrain package provides increased transmission tunnel clearance and simplifies installation.

No starter Clearance Cutting: The integrated starter design eliminates the need for additional starter clearance modifications, resulting in a cleaner installation.

Uses Every Factory Bolt: Unlike many adapter plate solutions, every factory engine and oil pan mounting bolt remains in use for maximum strength and secure OEM-style fitment.

Lightweight & Strong: Replacing the original bellhousing reduces weight and complexity while increasing drivetrain rigidity.

Billet-Level Precision: Manufactured from premium A356 cast aluminum, every bellhousing is CNC machined to the same high tolerances as our flagship billet bellhousing.

4340 Chromoly Flexplate Included: Every kit includes our one-piece 4340 chromoly flexplate with an integrated starter ring gear. Where required, flexplate adapters and pilot adapters are included for your specific application