I ran 17.3 with AEM CAI, Hotshot headers, Magnaflow muffler, Underdrive pulley, and ported and milled head, and cam gears. Most nonturbo autos are running 17's and 18's. There are a couple that ran 19's but I think it was the track. Hardly any autos are in the 16's nonturbo. I think it would take at least 180 flywheel hp for an auto to hit low to mid 16's.