dmp0001
New Member
I have a 2015 GT with the Vortech full kit. I live at about 6000ft altitude and I am currently getting 7.1psi at 7000rpm according to my factory boost gauge. I would like to see between 9 and 10psi. Do I need the 3.48" or 3.33" pulley? Thanks for anyone that can help! Pics for attention: