Black Forest Performance Inc. was established to offer a variety of performance and luxury upgrades for Porsche 911 sports cars, with a special emphasis on performance enhancements for the 997.1 Turbo along with interior upgrades in seating, luxury upholstery, carbon fiber and Artmetal accents, roll cage, and suspension improvements. We also are offering a unique version of the Restomod concept for the Porsche 964, an idea that is currently popular in the US and Europe, but with our own special ideas and done at Midwest pricing. We can offer both performance and interior accent improvements for any model of Porsche from 1989 to current models, to allow the owner to express their own style and performance level as desired.


Our background is in custom automobile building, our CEO, Dave Hartje, owned and operated Duesenberg Motors Inc. (see video), and built exacting reproductions of the most expensive and powerful automobile in the world in the classic era of the 1930’s. These unique automobiles were built to order, with the customer selecting colors, type of interior upholstery, and features to express their own style. Ownership of the famous Duesenberg Trademarks for over 15 years gives us a special appreciation for the history and traditions of the most famous modern sports car, the Porsche 911.

This process is the basis for the Black Forest Performance Method of creating a Porsche for each customer that allows them to express their own style and provides the driving performance they want, from street to track, with everything done to the highest quality standards and using only the best materials.

Through our experience in building the custom Duesenberg II cars, we have developed a Service Network of experts to facilitate the creation of unique automobiles, who are expert craftsmen specializing in different aspects of automotive building.

Service Network consists of:

Lcars Automotive Specialties, Inc. has over 40 years experience restoring classic cars to Pebble Beach Concourse quality, along with building one of a kind classics, and has an experienced team of craftsmen who will create the luxury interiors, custom body modifications, and show quality paint our customers demand. More information at

Protomotive Inc. has over 35 years experience in developing and building some of the finest Porsche performance engines, custom tuning, fuel systems, exhaust and cooling systems, and is known world wide as a leader in their industry. Their experience and custom machining will produce the high performance engines and other components that will provide amazing and reliable performance in BFP car builds. More information at

We only use the highest quality parts, either OEM Porsche parts or from our suppliers in the US and internationally who have established themselves as top quality providers of Porsche parts and body components. Each project that we undertake for our customers is designed with the customer, who specifies the look, feel and performance level that they desire. Our company motto is Performance Perfected, which is the standard we strive daily to meet. Please contact us to discuss we can create your dream Porsche, we look forward to working with you.