HRC is in this business to make a profit. That is why they developed the turbo kit for our cars in the first place ... there was a huge demand for it. They prolly will post a message after I say this.. but I see their non reply as an avoidance of discussing the detonation issue due to the fact that they don't want to scare people away from purchasing these turbosystems. So they lay low and pretend like they didn't see this thread. And I don't care if HRC comes at me all foul for saying this because I personally are not very fond of their business. Simply because when I called for advice way back when they wouldn't give it to me because I wasn't their customer with a proof of purchase of they're product. I was installing my star kit and I had no instructions and all I wanted to know was where to hook the vacuum hose up from the bov to the manifold or which was recommended. They totally blew me off.. so they can kiss my ass!!!!