Peterson Fluid Systems Chevrolet 2 -12AN Inlet Fitting Block Off PlateBrand Peterson Fluid Systems Part Number 09 0004 Category Engine Components Block Off Plates Condition Brand New Original Manufacturer Packaging Oil filter block off plates facilitate the hook up of wet and dry sump oil pressure lines to the engines stock oil filter pad. Applications cover standard Chevy V8s and bow tie blocks with either 10 or 12 AN fittings. Plates are made from billet aluminum and come with all mounting hardware necessary. Stock