For decades, the VW community relied on AS-41 and AS-21 magnesium cases, which, while lightweight, are notorious for warping, "shuffling" at the main webs, and pulling head studs after years of heat cycles.
Engine Case, Magnesium, Stock Bore, for 8mm Studs Dunebuggy & VW
Engine Case, Aluminum, 90.5 & 92mm Bore, for 8mm Studs Dunebuggy & VW
Engine Case, Aluminum, 94mm Bore, for 8mm Studs Dunebuggy & VW
Engine Case, Aluminum, 90.5/92 for 8mm Studs Sand Sealed Dunebuggy & VW
Engine Case, Aluminum, 94mm Bore, for 8mm Studs Sand Sealed Dunebuggy & VW
Case Half Washer 12mm for Aircooled VW Engine Case - Each 043101129