Making more engine power used to mean that you’d be changing everything from the camshaft and carburetor, to the intake and heads. It was an arduous process that was time consuming and at days end, cost major money. In today’s world though, increasing horsepower can be as simple as plugging in a laptop computer and hitting a few buttons. Chris Harris recently found this out when a little bump in software gave his lightly battered Audi S4 wagon a big boost in performance. Check it out after the jump.