By replacing massive OEM 600cpsi catalytic converters with REDSTAR downpipes we unleash all the potential that the biturbo has. Combined with ECU tune our downpipes will hold any power you can get even with big-turbo upgrade.
***please specify if car has OPF or not***
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More and more customers prefer catted downpipes over the catless and there is many reasons for. In case of flow and performance, catted downpipes at least on 90% as effective as a straight pipes, while benefit with sound quality (not as raspy, deeper tone), no gas smelling, passing possible inspections with no error codes* or CEL.