Installed the SI tuned ECU today. In my opinion, the difference is substantial to say the least! I also have a Borla exhaust and Evosport underdrive pulley kit, and I think these bolt on mods are finally creating some horsepower synergy.

One thing I would like to ask the other SI converts is, did your redline increase at all after the tune? For some reason, the engine is still shifting up at exactly 6,000RPM. I was under the impression that the redline would be raised as well... any comments would be much appreciated.