SD Performance is a company that specializes in performance tuning and modifications for various makes and models of cars, including BMW, Audi, Volkswagen, and Porsche. The company is based in the United Kingdom and offers a range of services, including engine remapping, performance exhaust systems, suspension upgrades, brake upgrades, and visual enhancements.

One of the main services offered by SD Performance is engine remapping, which involves modifying the software in a car’s engine control unit (ECU) to improve performance and power output. This can be done through a variety of methods, including tuning the fuel and ignition maps, adjusting the turbocharger boost pressure, and modifying the engine’s torque output.

SD Performance also offers a range of performance exhaust systems, which can improve exhaust flow and reduce backpressure, resulting in improved horsepower and torque. The company offers a variety of exhaust options, from mild to wild, including exhaust systems with high-flow catalytic converters, sports catalytic converters, and decat pipes.

Additionally, SD Performance offers a range of other performance upgrades, including suspension upgrades, brake upgrades, and visual enhancements. These upgrades can improve handling, reduce body roll, and provide a more aggressive stance.