soon I will be adding a hamilton cam and springs. with what I have in my truck I know I will be fine. my egt's are great now. with mach 4's I'm wondering what size bigger I could go with the single turbo. mach 5's would mach 6's be alittle toasty for a single I dont tow much. but I do know cam first and this summer will be Rip's twin kit added. also with a single turbo do you get better results with water/meth or better with twins. dont know about water meth yet since I dont tow just dont know if there will be a cost worthy thing to add or not. let me know thanks.