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im about to buy some edelbrock headers, hi-flow cat, and flowmaster 40 for my 93 auto. one question tho, will the headers line up with the stock y-pipe? i dont wanna install them then suddenly realize that they dont line up. also, should i just get rid of the cat and put a 2 1/2 inch pipe in its place? that sounds more fun to me, and i live in iowa, so theres no emissions testing around here 