This alloy non-resonated boost hard pipe replaces the turbo resonated turbo outlet pipe ( runs from the turbo down the left hand side of the engine) on the 1.8T 225 hp engines as found in the Audi TT S3 225 hp (8N), SEAT Leon Cupra R. (uses original mounting brackets) The removal of the noise reasonator allows unobstructed flow on the discharge or boost side of the turbo. We have also modified the