Report Swapped EX & IN Camshaft Sprockets in Engine/Ancilliaries Posted August 31 Cheers, Derek. Correction to my earlier post, which should have read:- There are coloured dimples. Standard for the 910S - Red - 110 deg MOP inlet. Blue 100 deg MOP exhaust. Green 104 deg MOP, for the 920, but can be used on the 910 inlet and exhaust.