Fully rebuilt and converted for use with unleaded fuel. The 12G295 head is the open chamber, big valve performance head for small-bore motors. You can see the similarity to the 1275 head. It was first used on the 998 Cooper with a raised-top piston, and also found on 1098cc MG Midget and MG1100. It is suitable for use on A+ 998s with flat top pistons. Sold outright.