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I have an 07 a6 with a haltech cai and full exhaust with corsa sports. My problem is I am not sure of what mods to do next. I have read several posts about the cathedral vs. the rectangular head setup and I am a bit on the fence. I want to keep my car simple due to maybe upgrading to a grandsport or c6z06 but that wont be anytime soon. I just need something more that will keep the new mustangs in my rear view.
I am debating an ECS kit but I want to see how well a N/A build will do before boost. I may have to change exhaust if I do a cam due to my respect for my neighbors