Alignment plates for positioning the camshaft in 30 degree TDC position. M275, M285 ("A" is used for cylinder left bank, and "B" & "C" is used for right bank) | M137 ("B" & "C" loosen / tighten camshaft sprocket mounting screws and adjust the timing.
The pin is for installing the plug into the timing case cover (accessing the chain tensioner). The second part is for unloading the chain tensioning device. To release the timing chain, insert this item into the timing case and push back the tensioning rail.