Very nice! My car seems to thrive with the A/F in the mid to upper 12's. Of course the car may only peak at 18 psi with just the code-3 pulley, and I have no plans on upgrading any thing else. I'm afraid I may lose power where the car just hauls with just the C3 pulley, tune and cai. No cooling mods either. I'll leave well enough alone, for now anyways.