One head had 6 pinholes in the intake runners(can not believe they sent them back to me in that condition) and the other had 1 along with some rough surface in the runners that needed to be smooth out..the pinholes were fixed by my builder I also told them I want the heads to be 65cc when my builder checked them they were anywhere from 63.5 to 65 cc's..I will NEVER be using Hughes again...