CDT-Shop, operated by cardiologie Tuning in Bergisch Gladbach, is an online retailer specializing in tuning and motorsport parts for performance and enthusiast vehicles. Its catalogue covers models from Audi, BMW, Ford, Honda, Hyundai, Kia, Mini, Nissan, Seat, Toyota, Volkswagen and other brands. Products span power, styling, sound and handling upgrades, including intake systems, performance air filters, intercoolers, oil and water coolers, exhaust systems, downpipes, silicone hoses, brakes, clutches, suspension kits, lowering springs, wheels and body components such as spoilers, front lips and body kits.

The shop features products from established manufacturers, with examples including KW, EBC Brakes, Pipercross, AIRTEC Motorsport and Maxton Design. Customers can search by vehicle and product category or use the tuning adviser for tailored recommendations and individual offers. CDT-Shop also provides contact support, convenient payment options including instalments, and, where requested, installation through its own specialist workshop and assistance with TÜV approval.

Items held in its Bergisch Gladbach warehouse are generally dispatched within one business day; direct-from-manufacturer orders typically take one to two weeks