i have an 82 trans am with the cfi engine. I bought new 3" heddman headers and im thinking of just attatching 3" tubing straight back from the headers to 2 hooker mufflers. I know I will have a fun time rerouting everything but how much horsepower do you think ill gain from this setup.
1 more thing...because i will have no cat do you think it will be very loud, cuz i really dont wanna get a ticket.
-and new 8mm p wires..how much hp???