911 'GT' OPF V-BAND CLAMPS Valve we save a total of

we save a total of 8

dropping weight and improving performance

For our direct replacement rear silencer the peak gains we're a not insignificant 11hp & 5tq with gains across the full range of RPM

active with bolt valves open and closed also provides an improved exhaust scavenging effect along with a smoother and more pleasant tone

Utilising the latest FEA technology this part has been engineered to out perform the OE piece in every way according to official test criteria set out by manufacturers

911 'GT' OPF V-BAND CLAMPS Valve we save a total ofIntroduction Since the introduction of the 'OPF' equipped 911 GT models, when changing the exhaust system, it's necessary to also purchase a set of OPF clamps from Porsche in order to install due to the factory clamps being welded in place on the factory rear silencer. Over the past couple of years, the price of the OEM clamps has more than doubled and the quality has become more and more questionable with multiple failures now reported. We felt it