This is s universal case cut for 90.5 mmcylinders this case is a small 8mm stud also the case is already set up for full flow oil has oil dipstick hole for use on vw type 3 the case is a AS 041 had the mounting holes for engine carrier.
These heads are cut for 90.5 cylinders they feature large 41 or 42 mm intakes and stock exhaust valves also they have bronze not brass valve guides plus the seats were re cut.
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