Projects

Everything about our project cars

BMW 850i E31

The manual BMW 850i (E31) is one of the most underrated GTs of the nineties. While many examples were delivered with an automatic, the rarer manual version combines the character of BMW's first modern V12 coupe with a much more direct driving experience. The 5,0-liter M70 V12 delivers 300 hp and, above all, a silky-smooth power delivery, with the six-speed manual making the driver more involved in the car's character than the automatic variant ever does.

The BMW E31 8 Series was technologically advanced: electronic throttles, multilink rear suspension, and a sleek aerodynamic design that still looks modern. At the same time, the 850i manual remained relatively analog in feel—a combination that is becoming increasingly rare today.

Precisely because many collectors focus on the later BMW 850CSi (E31), the manual 850i remains interesting for enthusiasts seeking V12 smoothness without the more extreme price tag of a CSi. With subtle upgrades to weight, brakes, and suspension, it can become an impressive OEM-plus grand tourer: discreet, rare, and built for long distances at high speed.

Porsche 996 Carrera 2

We've owned our demo Porsche 996 3.4 for a long time, and every year we develop, purchase, and test new parts for it. The car's theme is CUSTOM CLASSIC. A package has been developed to lighten the car while maintaining a classic Porsche look and fine-tuning it extensively to maximize driving pleasure.

Aston Martin DB7 i6

We've owned this Aston Martin DB7 i6 with a manual transmission for three years now. It's incredibly undervalued and rare (the 6-cylinder supercharged with a manual transmission production run was limited to 500).

While retaining the classic look of the unique Ian Callum design, we've completely overhauled the car's technology with more modern technology and weight-saving measures. More dynamism is achieved through lower weight, primarily by focusing on less unsprung weight. The result: sportier handling without sacrificing comfort!

Porsche 924 Targa

This 924 Porsche 2.0 1984 Targa is being completely rebuilt into a unique sports coupe with modern technology and a classic look.

High End Performance Builds at Custom Concepts BV

Custom Concepts supplies high-end automotive performance parts for high-end projects. Think of a Porsche restomod, a Youngtimer BMW performance build, an Aston Martin upgrade project, or components for a high-performance engine. We supply parts for projects that are technically sound and professionally assembled.

We are not a workshop, but a specialized partner in performance parts. Based on years of experience, we select proven components from brands such as Mahle Motorsports, Powerlite en LN Engineering.

From concept to component selection

A strong project starts with the right technical choices. We assist with the selection of engine components based on power, reliability, delivery time, and application. In addition, we advise on engine construction, stroker kits, compression ratio, and camshafts.

We also supply components for performance upgrades, such as ITB systems, faster camshafts, reinforced internal engine parts, and motorsport-grade fasteners. Additionally, we support OEM plus upgrades that preserve the original driving experience.

Whether it concerns an air-cooled Porsche 911, a BMW V12 build, or a restomod based on an Aston Martin, we supply parts that fit the project. Also, check out our projects for examples of custom work and upgrades.

Focus on quality and sustainability

Project cars are often subjected to heavier loads than standard vehicles. Therefore, the focus is on reliability under high thermal and mechanical stress, a longer lifespan for critical components, and a good balance between performance and OEM quality.

The right component selection prevents unnecessary overhauls and contributes to a sustainable result. This is important for high-value vehicles.

International network of specialists

Custom Concepts We do not carry out installations ourselves but collaborate with a network of specialized workshops and engine builders within Europe. This allows us to supply parts per project phase and support technical coordination between the customer and the workshop.

Within this network, specialized knowledge is available for the overhaul of classic injection systems, modern programmable injection, and the overhaul of adjustable magnetic shock absorbers and other specialized systems.

Why choose Custom Concepts

Custom Concepts focuses entirely on high-end automotive performance parts and solutions for complex projects. With knowledge of platforms such as Porsche, BMW M, Aston Martin, and Ferrari, we supply exclusively premium brand components and technical advice for specialist builds.

View our brands, discover recent projects or contact us directly.

Start your project

Are you working on a project car and do you want to make the right choices immediately? Take get in touch for targeted component selection and technical advice.