i think the 93 is the best of the 2nd generation probes. Mine stock ran a 15:20 secs in the quarter and most 94 thru 97 run between 15.7 to 16.3 at least the ones ive seen. So im glad i bought a 93. I have K&N intake, high flow cat, and greddy exhaust. Im soon to be getting a head package done.