Hi guys. I have a G6Et with 325rwkw. It has full Nizpro exhaust,Nizpro cooler,id1000 injectors,12p actuator etc etc. In 2 weeks its going to Xtreme Ford Tuning (Perth) to get battery relocation kit,race air box,valve springs and GTX3582. Its purely a road car. It wont see a drag strip and im more about how it drives and not about being a dyno queen. I have beard that the GTX3576 is still responsive and still pulls hard. Just spoke to a guy at a track day with the 3582 and he said it really it pretty laggy and recommended the 76. I have only a short time to go one way or the other. Please could anyone with some experience on this help. I dont want to make the wrong choice. Thanks.