MR-SSDP-HG0920T Downpipe Genesis Coupe 09-12 2.5" regular 2.0TRacing Down pipe will replace your OEM exhaust piping with all of its restrictive bends, so the inner diameter of pipe will increase. The result: freeing up high end horsepower and mid range torque with increase in exhaust flow and reduced turbulence in the system. Notes: Race Only product that is not to be used on vehicles that are operated on public streets, roads or highways