The Coors Alphalaris was a 800 silber turbo. It worked very good. My Alpha withs Jaws pipe and Arctic Edge flash is very close to the turbos running 5 lbs and similar track lengths. The purple 850 is running a MTNTK turbo at 5 lbs and a 175 doo track and was the fastest in our group. The 13 pro runs a MTNTK turbo and 174 with Baker skid at 5-6 lbs is close to the 850. The 175 doo turbo with Altitude powersports clutching is basically stock runs with the poo turbos.