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Just had an interesting thought/question to ask you as I was reading all of the threads/replys to the LS2 tune/Edit: I have an C6 A4 with a 2:73(which I will change probably next year?), a Calloway Honker Air Breather and Corsa Sports.
Question: When you tune a car, say with these specs, does it matter whether the car has an X-pipe or an H-pipe configuration?