It is E85. They also mentioned that with a Griptech, it eliminated the slip. Would there be any issue with expecting this car to hold up if I'm not beating on it all the time? It wouldn't be a daily but I would like to drive it a good bit. I'm even considering 'less' pulley since I want to keep the car awhile without any major issues.That is a lot of pulley. I'm sure he did have belt slip.
Yes, it's possible. Not likely on pump gas though. If on E85, then for sure possible.
Mine is a 2011 coupe with about that many miles. With E85, 2.38 upper (~14# boost), no cats, Dsteck tune, air raid, etc it made 640rwhp. A lot more pulley(boost), heads, cam, etc would take it to mid 700s with a good tune.