Porsche 996TT K24/18G 60lb Injectors 650HP Tune VRTuned.com August 19, 2009 Product Info 1 Comment Porsche 996TT K24/18G 60lb Inj Upgrade 650HP Tune The most popular turbo upgrade for the 996 Turbo is taking the OEM K24 turbos found on the X50 or GT2 and having them modified with an 18G exhaust side....