mtgsxr,
I have the ExtraPerformance piston upgrade in my 912. I have been researching various options for my engine due to what I feel is excessive oil useage of my engine. Having spoken to a couple other guys that have these same pistons, I was told this is common with the HC pistons. Any truth to this??? Heck if I know but I am pretty sure I am going to eventually purchase the Big Bore kit from Hal.
My engine is 1996 vintage with less than 200 hrs. TT