Welcome to Epytec – When classics become real projects

Do you drive an Opel Kadett D and want to upgrade it both technically and visually? Then you probably know that original parts are scarce, modern components often don't fit, and many modifications require custom solutions. That's where we come in. At Epytec, we are the world's leading supplier of tuning adapters – specifically manufactured for vehicles like your Kadett D. With over 15 years of experience, TÜV-compliant solutions, and 100% Made in Germany, we ensure that you can install virtually any part safely and cleanly.

Our tuning adapters allow you to install modern rims, more powerful brakes, or sporty suspension components – without stress or risk. With us, you don't just get a product, but a piece of genuine, first-hand development expertise.

The Opel Kadett D – Light, angular, unmistakable

The Kadett D was built between 1979 and 1984 and was the first front-wheel-drive Opel. Models with type codes 32, 37, 39, and 42 are particularly well-known in the classic car scene – not least because of their light weight and robust engineering. Whether as a three-door or five-door, in GL trim or as the economical 1.2N – the Kadett D is a classic that lends itself perfectly to technical modifications.

But this is precisely where the challenge lies: Anyone wanting to install modern components on a Kadett D will encounter problems. The original bolt pattern doesn't match current rims. Brakes from later models can't simply be used. And it's a similar story with the suspension – the mounting points are too different.

Our solution? Tailor-made tuning adapters that allow you to do exactly that: equip your Kadett D with the latest technology – entirely according to your wishes.

Brake adapters – safety and performance for your classic car

Why you should upgrade your brake system

The Kadett D's brakes were perfectly adequate when it was built – but they're no longer up to date, especially for sporty driving or larger wheels. Our brake adapters allow you to safely and correctly install modern brake systems on your vehicle.

Whether you want to install a brake system from a Kadett E GSi, Astra F, or Calibra – our adapters provide the right connection to the axle mount. This not only improves braking power but also the thermal capacity and responsiveness of the system.

Your advantages with Epytec brake adapters

• Suitable for many brake systems from Opel and VAG models
  
  
• Improved braking power for greater safety
  
  
• TÜV-compliant and with technical documentation
  
  
• Precisely crafted for a perfect fit
  
  

A classic car with modern brakes – that's not only sensible, but also noticeably safer.

Wheel adapters – More choice, more style, more stability

No more rim frustration

The Kadett D has a rather unusual bolt pattern, which severely limits the choice of modern rims. Our bolt pattern adapters solve this problem. With them, you can mount wheels with almost any bolt pattern – including classic BBS, ATS, OZ, and modern performance rims.

At the same time, our adapters offer you the option of widening the track. This not only ensures a more stable stance, but also better cornering and a more responsive driving experience.

Advantages of the Epytec bolt circle adapters

• Secure mounting of rims with a different bolt pattern
  
  
• Increased track width for better grip and handling.
  
  
• High-quality aluminum – lightweight, stable and durable
  
  
• TÜV-compliant, including documentation
  
  

This will not only make your Kadett look better – but also noticeably more dynamic.

Suspension adapters – Get the most out of your driving performance

Classic with cornering quality

A firm, sporty suspension transforms even a Kadett D into a true driving experience. However, modern suspension components rarely fit without modification. Our suspension adapters allow you to cleanly install components from newer Opel models or motorsport accessories.

Whether you want to install coilovers, replace control arms, or make camber adjustments – our adapters make it possible. You gain precision, stability, and control – everything you need for a confident driving experience.

Advantages of our chassis adapters

• Compatible with modern chassis solutions
  
  
• Optimization of toe and camber values
  
  
• Durable, maintenance-free and robustly constructed
  
  
• TÜV-compliant thanks to documented technology
  
  

This means your Kadett D drives not just like a classic – but like a precise tool on four wheels.

Epytec – Because we've rethought tuning adapters

Our adapters represent true engineering excellence, crafted with passion. With over 15 years of experience, our own machinery, and a focus on both classic and modern vehicles, we deliver products you can rely on. Made in Germany – and designed for your project.

Your advantages at a glance:

• Tailor-made solutions for your Kadett D
  
  
• TÜV-approved and ready for installation
  
  
• Direct sales from the manufacturer – fast, fair, competent
  
  
• Personal consultation for your renovation project
  
  

We offer no compromises – but exactly the part you need.

Still have questions? Our project page has the answers.

On our project page you'll find exciting modifications, technical explanations, adapter comparisons, tutorials and much more. Perfect for expanding your knowledge and taking the next step in Kadett tuning.

FAQ about Epytec tuning adapters for the Opel Kadett D

Question 1: Which rims can I use with bolt pattern adapters on my Kadett D?

Our adapters allow you to mount rims with 4x100, 5x100, or even 5x112 bolt patterns – depending on the adapter type. This opens up a wide range of rim designs from the aftermarket or other brands.

Question 2: Can I also use the brake adapters to convert to ventilated discs?

Yes, our adapters allow you to upgrade to ventilated and larger brake discs. You can also install brake calipers from more powerful Opel models – ideal for improved braking performance during sporty driving.

Question 3: Do I need to make any modifications to the bodywork when converting to an adapter?

In most cases, no modifications to the bodywork are necessary. Our adapters are designed to fit the original axle mounts. Only with very wide rims might adjustments be required.

Question 4: Are there also adapters for special requests or unusual combinations?

Yes, we regularly manufacture custom-made products for special projects. For example, if you want to combine components from other vehicles, we will develop the right adapter for you – customized and TÜV-compliant.