Bought a set of 29.5 x 9 inch slicks off off of craigslists approximately 6 weeks ago and decided spur of the moment to go to the track today to test them. I own a 2012 base gt with 6m and 3.73s and a lidio tune and c and l cai. Pitted next to a 2012 shelby and 2013 ZL1. The gentlemen were twin brothers. I put the slicks on my car and the one gentlemen asked what do you think it will run? I said with 28 inch DR's it went 11.86 I hope it will run in the 11's today since it was much cooler when it ran 11.86. He asked would you like to run my ZL1. I said absolutely. We lined up I ran an 11.97 @ 117.25 to his 12.35 at 116.23. We get back to the pits and he says you gotta have a blower or something on that thing. I pop the hood and say only a tune cai and slicks. He said what did you pay for that thing. I said 1/2 of that ZL1. He asked, since you have slicks how bout I leave on the second yellow and you leave on green. I said ok. We lined up again. He leaves on the second yellow I leave on green. I nosed him out I ran 11.92 at 117.27 to his 12.55 at 115.89. On the way home we stopped he bought beers. His brother's 2012 ran consisent 11.80's at 120-121. Great guys.:beer: