These are a set of three Nylatron rocker spacers, that replace the side load springs in the rocker arm assembly on your MGA, and MGB. The advantages of the nylatron spacers is that they keep the rockers arms perfectly aligned over the valve, and keep friction to a minimum. Over the years the side load springs wear out, and let the rocker arm move around. Order a set today, and keep your MGA and MGB rocker arms inline.
