What am I looking at for whp on an NA KA24DE (dohc) if I do catback, intake, headers, cams, pistons, rods, port and polish... ect. How much am I looking at total. And is it worth it. I am looking to spend around 1500-2000 on this car. Just let me know if that is reasonable. I know the pistons and rods prolly not, but can I get cams that I wont have to change the pistons and rods out. Will they be worth it and is port and polish really worth it. Also what is the stock rwhp of a KA with around 80k on the motor.