Feeler, Procharger stage 2 kit with a polished F-1C head unit, less than 10 passes on the head unit never over spun, and a tial 50mm bov and a custom precision 46mm wastegate set up, and a 4.00 pulley( made 20psi) and a 4.30 pulley 16psi, on my Aluminator engine. 5900 obo