the power gains are gonna be about the same as far as an x or h pipe goes. X pipes give you more of a high pitch raspy sound like a nascar and h pipes give more of a deep rumble sound like a muscle car...
Do NOT get 3' exhaust unless your planning on getting some sort of power adder such as a supercharger in the future. IT would be absolutely pointless and youd probably actually lose power due to having no backpressure.
As far as a catback goes, if you want maximum power go with straight through mufflers such as magnaflow, dynomax, slp etc etc...
LT headers are definately a great power adder but dont expect to be able to pass inspections with them.
Do NOT get 3' exhaust unless your planning on getting some sort of power adder such as a supercharger in the future. IT would be absolutely pointless and youd probably actually lose power due to having no backpressure.
As far as a catback goes, if you want maximum power go with straight through mufflers such as magnaflow, dynomax, slp etc etc...
LT headers are definately a great power adder but dont expect to be able to pass inspections with them.