I have a '04 SS Silverado 6.0, I wound up with a ATI Procharger Kit For with the D1SC Head Unit and 3 Core Intercooler. The folks over at Procharger arent real sure what pulley I should run on this to get 10PSI. They tell me that not too many people run the D1SC on the 6.0's. Any Suggestions?

 

My 5.3 with a 4.1 pulley is 10-11 psi. I would think something slightly smaller would get you there, maybe a 4.0 or 3.9.