COBB Tuning has outdone itself with the COBB 3” Downpipe for the 2007-2008 MazdaSpeed 3, which is a study in engineering design and artistic execution. The COBB 3” Downpipe replaces a very restrictive element in the Mazdaspeed3 exhaust system. Considerable effort was spent designing a flow path with the fewest number of direction changes and minimal degrees of bend in order to eliminate restrictions. This beautifully fabricated downpipe delivers significantly improved exhaust flow, resulting in faster turbo response time and power gains across the entire rev range, while still protecting the environment with its highly efficient custom catalytic converter.