so in the first picture you can see the port is not even straight in the rest you can see no radius on the ports. I have not checked the piston clearance yet. Carlos if your seeing this please chime in. In my opinion even the smallest of ports need it because the ring will have less wear at the opening and at some point the ring will enter the port and catch that the shard edge plus the sharp edge will scrape the oil of the ring. and right from ESR don't touch it. bolt on kit with port match 7. so I think I am ok by saying less then happy some might say I would be in my right to be very unhappy. Thought guys?