Lets be real here, the reason IPP is "great" in some people eyes is because HIS PRICES ARE CHEAPER. IPP does not build their motors and the guy who does doesn't do it well. The 2 motors I bought and the one my friend bought blew up and I heard 3 others blew up on the Dyno when SZ was tuning them recently. However Mitch's engine on the same Dyno that day held up just fine. Shop by price and get what you pay for.