Ok so I posted this in the wrong forum earlier.... If anyone can help me I'm very curious! I need a little clarification, I get the standard vs Hi-Helix rotors 60 vs 120. But I'm curious about standard cases, looking to update superchargers and my rules state 8-71 standard case and standard rotors. So when it says standard case is the rule implying that I must have a full opening? Or do they make different openings in a standard case?