ehh. i dont know about a brick wall. its like everything else i guess. there are a couple low budget, high output mods taht everyone does first… exhaust, boost control, computer reflash etc… but when you start getting into internals or anything else it gets more expensive, and your not getting the HP per dollar you spend the same as you would with an exhaust or something basic.
but that would be the same thing with any of the SRT parts i imagine.