With a tune and highflow cat b7 s4 owners saw 30+ whp gains. That would make me a happy camper. Spinner. Is the knowledge of how to remove the cats going to be share with the community? I can't do straight pipes but highflow cats will let me pass emissions and get sexy power... ahhhhhh can't wait... I hate you.. so jealous..
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So in the end they couldn't remove the cats? They just cut and rewelded?
Well for NA 3 inches probably would actually cause too much loss in back pressure. Probably better that they can't fit it. Anyways they gonna make the pipes for everyone?
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