Hey need some help with some info. First off on the svt what is the stock size of the mass air. Second what would be the benefits of 73mm mass air which i dont think is to much bigger but are the benefits worth it i have exhaust and intake and off-road y-pipe. Just wondering if it is worthit or not. Last, lately the car does not feel as strong as it use to only got 50,000 miles on it if there is anything i should check out on it, just tell me what yall think is wrong with it. But thanks for all info.