[Jake Raby]

Most M96 lifters fail due to debris inside them. The 948 Cayenne engine used these same lifters and they do not fail. These are anti- drain tappets, as they only have one inlet in them and no outlet, makes them work great most of the time; but once debris gets in, it doesn't leave.

I have modified lifters in the past and found many benefits, some of my engines in the future will go to solid lifters as that development moves from the X side to the production side here.