I have a B5 S4 with a giac tune and I'm going to install my awe twin 1 that should be coming in tomorrow. I was thinking of my next upgrade to be Meth Injection. I called up Greg at SSPtuning about his meth kit and he said it would run me about $600 all together including the tune and I'd see gains between 40-50hp at the crank. What do you guys think of meth injection on K03's and the hp gain?
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