does anyone know who would make a good piston with about 11:5:1 compression that would fit a stock LS engine?
pr3 pistons will give it about 11:1 which would be good, but if you must have close to 11.5:1 look into wiseco, srp, import builders (which are wisecos), JE, Arias. there are lots of choices just look around a bit. 