Classic Mini champion spark plug for aluminum cylinder head

If you are fortunate enough to be using one of our C-AHT345 aluminum cylinder heads then you will know that one of the design features of the head it that by using these special smaller diameter spark plugs the internal water jacket flows completely around the plug. This is a tremendous benefit in keeping the combustion under control while maintaining engine temperatures. The heat range of this plug is ideal for every day driving with high compression engines. This is a 12mm spark plug.