I'm with this guy. My LS1 with an slp lid and magnaflow catback ran 13.00@110...have a hard time believing that you stuck with that car as your car wouldnt trap anywhere near 110...maybe 101-102...and with a cutout too? There was something wrong with that LS1 because mine and everyone else's are freight trains on the highway! My buddy has a regal gs with an intake, 3.4, SLPs, 2.5" catback, fuel pump rewire, 329s and a shfit kit and the best he could get out of his car was 13.29@ 102 which is damn impressive for those mods....ya, i walk him everytime...no matter what roll we go from