Renntech

Historically, RENNtech has been a prominent Mercedes-Benz specialist, but recently, RENNtech has begun to offer performance products for other marques specifically Porsche, Volkswagen/Audi, BMW and Bentley vehicles. The product offerings focus on RENNtech's core competencies such as performance engine tuning, suspension, exhaust and custom fabrication.
RENNtech designs, engineers and manufacturers their proprietary line of tuning products in-house at their facility which features a full fabrication and machine shop with CNC and rapid prototype capabilities; an in house performance dyno, complete engine management and software tuning capabilities.

All info came from this page: http://www.renntechmercedes.com/index.php/products/mb/amg-gt/gt-s-15

Renntech offers the following products: