The GHL MAZDASPEED downpipe is a true turbo downpipe. This system bolts up to the turbo and replaces the stock S-pipe, J-pipe, midpipe and both catalytic converters. This downpipe releases the restrictions of the stock S-pipe and features a flow separator to keep the wastegate gas from causing turbulence in the exhaust stream.

Flange Option
The 2.5" catback flange option for the downpipe can reduced the 3" piping to a 2.5" flange in order to mate with the factory catback exhaust or GReddy SP-2 exhaust.  A 3" flange option is available but requires a 3" catback to mate properly.  The "no flange" option is available for custom exhaust systems the want to weld to the downpipe.  There will be 6" of extra 3" piping where the flange would be.

The Stud Kit replaces stock turbo studs and stock lock nuts. Upon removal of the stock lock nuts, the studs get stripped and cannot be reused. If you are able to reuse any of the stock hardware, any portion of the stud kit can be returned for a refund. The stainless steel Stud Kit includes 5 x studs, 5 x lock washers, and 5 x nuts.