I have had the 93 LMS tune for a while and have done a couple tests including adding a K&N filter (which made the car around .1 seconds faster for just a panel filter), and recently I had the opportunity to test out the 91 aggressive tune plus firmer shifting tune from LMS "The transmission tune has firmer shifting and an overall more aggressive shift strategy which is the primary changes to the tune. The 93 tune would still have more timing advance because of the higher octane." - LMS Impressions of the 91 agr. tune: the shifting is actually better then the current offering of tunes! Shifting is very quick (almost like my DSG VW, but not quite) and CRISP, there is no clunking, banging, etc. from the shift strategy on this tune - which the other 93 tune doesn't really clunk, but I feel like it sometimes bangs into the next gear on full throttle and I feel it can be a bit smoother. Normal "D" is very nice with the shifts also, crisp and clean. I think there is a bit more aggressive tuning (timing) in this tune based on the canned tune but I am not 100% certain. Either way I ran three times and had very similar results each run. It seems that this tune is just a SMIDGE slower then the 93 can tune (pretty cool). I now want the shift strategy on my 93 tune! DA was pretty much same for all runs for both tunes (-2200 DA) Left was the best time for the canned 93 tune and 3 runs for the 91 aggressive tune on the right - Thanks.