Anodized aluminum billet oil cap for many General Motors vehicles.
There are 2 different oil cap styles used on LS-based engines.
This oil cap has special features that consolidate the differences.
The top 7/8"-14 threaded port accepts 10AN ORB adapter fittings. Furthermore, it features internal stainless steel baffling that can be used for crankcase venting air/oil separation.
20-0539 OIL CAP, GM
Anodized aluminum billet oil cap with a 10AN ORB plug to block-off the internal baffle. This is simply a replacement oil cap. Nothing else is required.
Confirmed Engine Compatibility:
LS1, LS2, LS3, LS4, LS6, LS7, LS9, LSA, L76, L99, L9H, LT1, LT2, LT4
NOTE: there are other compatible engines not listed.
Optionally, the center 10AN ORB plug can be unscrewed and removed. Underneath is a cleanable and reusable stainless steel baffle for air/oil separation. Click HERE for a list of compatible 10AN ORB fittings to make a custom crankcase venting setup.