I've spoken with supersix several times, and they have excellent customer service. They can answer any questions, and really explain what different options mean. I would contact them to really get a good idea of what can happen. In order to replace the cams, an engine pull is required, and it can add up the cost really quick. The heads alone add a lot of low in power. They have a dyno sheet on the site. That dyno sheet is on a stock car with no tune, so I bet with a tune the head change alone would really help. The best thing they offer is the forged bottom end which will allow you to safely capture more boost from forced induction. All this is extremely expensive however and trading up to a gt, I found, is cheaper. You also have to consider your rear end, ds, transmission, brakes, tires, suspension, fuel pump, ect., to run a lot of power. Its fun to dream about though.
