Twin Turbo Intercooler Kit + Intercooler Silicone Pipe Hose For VW GOLF MK5 MK6 GTI FSI JETTA 2.0T AUDI A3 This uprated intercooler has been designed for the VW GOLF GTI equiped with the turbo4 cylinder engine. Our criteria was to achive maximum efficiency whilst retaining a simple fitment With our testing results indicating increased cooling of up to 30 degrees centigrade and the ability to install this on your driveway at home in under one hour After considerable trials with different intercoolers cores, we found that the most efficient for these models, was a core of bar and plate design, and along with an overall increase in dimensions we have been able to improve the cooling ability and reduce the pressure loss across when compared to factory intercooler In the construction we use CNC machined bayonet couplers which allow an easy plug and play install