I recently installed a new cam, harmonic balance & pulleys, stainless headers, air intake and had the engine tuned & dynoed. The stock motor was around 325 HPRW and 427 HP overall. After the upgrades it was dynoed at 460 HPRW not sure total HP. The car is without a doubt a totally different animal and the sound is crazy. I’m very happy with the outcome. I think the next upgrade will be a 3inch CORSA performance exhaust.