Manufacturing partner to
aftermarket automotive.
4131 manufactures precision components for businesses developing and selling aftermarket automotive products - supporting brands, product developers and manufacturers from prototype through to commercial production.
We work business to business. Our customers are aftermarket automotive brands, product developers, performance manufacturers and distributors who need components made accurately and repeatably at commercial scale. 4131 is not a retail automotive workshop and we do not take on one-off custom car builds.
Machined Product Components
Precision components manufactured for aftermarket automotive brands and product ranges.
- Precision machined aftermarket components
- Brackets
- Mounting components
- Adaptor plates
- Housings
- Spacers
- Bushes
- Custom hardware
Performance Products
Components for performance product ranges where fitment, finish and consistency matter.
- Performance product components
- Billet components
- Fitment hardware
- Machined assemblies
- Finishing and assembly support
- Components manufactured for automotive brands
Development to Production
From first prototype to commercial production volume, with engineering input along the way.
- Prototype components
- Low-volume production components
- Repeat production runs
- Replacement components
- Design for manufacture review
- Cost-down engineering
Industrial Design & CAD Support
No production-ready CAD yet? We can help develop the model and move the product toward manufacture.
- Manufacture-ready CAD models
- Concept to component development
- Reverse engineering from a sample
- Material selection
- Tolerance and fitment review
- Production tooling and fixtures
Send us your CAD files.
Have a component you need manufactured? Send us your CAD files. No production-ready CAD yet? Bring us the idea or product and our engineering team will help develop it.