If you've ordered the exhaust already, oh well. If you haven't, I'd get the TRD
exhaust. It has better gains and it's not as loud. Headers, I'd wait for TPR's. They're going to be badass. The Intake
, I'd buy TPR's, they've had better results than Injen
. You could also go with a fidanza flywheel, AEM
Pulleys, and a small shot of nitrous (if hidden properly, no one will know). There are Turbocharger kits, but god help you trying to hide one of those. Hope this helped.