my freind has a ls1 powerd corvette and the engine is totaly stock /w a 100 shot of nitrous and was running 12.79 on the 1/4 on full bottle and dropped off a tenth of a second each run because of bottle presure. lok on JEGS.com fror vary cheap prices

 

your friend doesnt know how to drive then..ls1 vette should do 12.7's on nitto's, exhaust, and lid...maybe not even the nittos