Ok just found out E-13's 328RWHP was at 9.5 psi not the 8 or 8.5psi like Rygn's still nice but this explains reason for the difference, I am not looking to run 9.5psi at this point but nice to know you can just dail it up per installed mech knob or electronic inside the drivers cabin if you want. Still want to see the group price..
