Sorry M, I had a busy weekend. I got mine from PAW... They were SSI, but really anyone's stock replacements will be the same part. The biggest difference is the MP ones (or factory stockers from the dealer which might be cheaper..) have the paint daub that marks the "top". All you have to remember is the hole in the lifter (down in the oil groove of the outer body) has to point towards the valley side of the lifter bore.