Exhaust flow is very important in turbocharged cars. The more restrictive your exhaust is, the less horsepower your car will have. RS*R Downpipes are designed to extract maximum performance in a safe, long lasting design. Significant power and torque gains are realized with the installation of a RS*R Downpipe. Tests have shown gains up to 50HP when you use a RS*R Downpipe with GT2 exhaust system. All RS*R Downpipes are for Off-Road Use ONLY.