oh ok.. .433" lift. They aren't a solid lifter cam. Its a reg cast iron core blank with a different profile. Just an FYI. Theres nothing really special about them other than that they have a higher then normal lift on them. I spoke to Clark directly about them and they were originally for Mike Smith to be used with a Z33 lifter and so forth. Mike was supposed to make his own one off cylinder head for his vehicle but never got around to doing so..thats where Kuah came in and was sold those cams. JWT will not warranty that camshaft as its not a production model and they don't guarantee its performance or integrity due to the fact its not a solid lifter designed camshaft.