Overview
Looking for a custom gearbox adapter plate to fit your unique engine and transmission setup?
At Brightstone Engineering, we design and machine bespoke gearbox adapters for all types of engine swaps, transmissions, and bellhousings — built to exacting tolerances using aerospace-grade aluminium.
Whether you’re building a BMW, Toyota, Nissan, or Honda conversion, we can manufacture a custom gearbox adapter that ensures perfect alignment, reliable torque transfer, and OEM-level fitment.
We’re also known for producing custom gearbox adapter plates and gearbox conversion plates for engine swaps and transmission projects.
Features
- Precision CNC machined from billet aluminium (6061-T6 or 7075-T6)
- Designed for ZF, DCT, and manual transmissions
- Compatible with stock or custom flywheel, clutch, and bellhousing setups
- Tailored bolt pattern and engine-to-gearbox alignment
- CAD-based design with optional 3D scanning service for exact fit
- Custom kit options available (adapter plate, bolts, dowels, alignment pins)
Applications
Our custom gearbox adapter plates are ideal for:
- Engine swaps (petrol or diesel)
- Performance and race builds
- Restorations and classic conversions
- Prototyping and one-off vehicle modifications
- Specialist custom fabrication projects
Process
The price on this product varies based on exact details of what is required. In order to get an exact price, please contact us on contact@brightstoneengineering.com
- Submit Your Details: Contact us with engine and gearbox information.
- 3D Scanning or Drawings: We can work from your measurements or scan components.
- CAD Design & Approval: We’ll produce a detailed CAD model before machining.
- CNC Machining: All adapters are milled in-house on our HAAS CNC for precision.
Why Choose Brightstone Engineering
- UK-based machining and design
- Experienced in engine swap adapters and transmission conversion kits
- High-strength aluminium and tight tolerance manufacturing
- Custom design service for any engine and gearbox combination
Brightstone Engineering is among the few UK gearbox adapter plate manufacturers capable of machining bespoke gearbox adapter and engine gearbox adaptor plates to exact specifications.
For one-off or custom-fit gearbox adapters, contact us now.