Valve spring sold as singles for Pre A plus 850/998/1100.
This was also the outer on the 997/8 cooper range but the inner is obsolete so use our
C-AEA525 where the outer was the same length.
12G1015 was used on many A plus valves which are no longer available so this spring has to be used with Pre A plus valves on A plus heads. Our
C-AEA526 will fit anything.