I only plan to spend about $500 on my next mod or two. I have most of the common bolt-ons, including Bassani off road x pipe, Borla catback, steeda pullies, removed air silencer w/ K&N, Fluidyne radiator, 4:10s, lowering springs, and some other stuff. I'm mostly looking for a modification that's gonna help my car go faster. Unfortunately, everything I want to do to the car costs big bucks. I don't want to mess around with new mass air meters and chips b/c I don't want to have the car running incorrectly b/c I didn't get it dyno-tuned. What is there to do, or should I just buy some Moser axles and a new differential and build up my rear end more? How much does a port/polish for the intakes and heads cost?