That's pretty good for just the pulleys, so when you say it was tuned did they get into the ECM or just do plugs and a tune up type work? Is it 100% stock other than pulleys? What plugs and wires are on it?
I bet, I'm going to do a few bolt ons like pulleys and new exhaust before I break into the ECM. I cut the stock mufflers off and ran pipe in their place the first day I had it, it sounds pretty good but not duals with good mufflers good. That resonator has to go! Lol