The Crosswind or whatever they call it,it's a knockoff of the Edelbrock performer RPM. I've heard claims that the Edelbrock is much stronger but haven't swapped them to see the result. The cam was ground by Bullet cams and is a compromise as valve to piston clearance was a concern. 284/292@.006 226/234@.050 .558" on a 108lsa in @106. We also run a double spring setup from Bullet with this cam.