Water Neck Spacer - 1 in Thick - Four 1/2 in NPT Female Ports - O-Ring Seal - Aluminum - Black Anodized - Chevy V8 - Each Brand Allstar Performance Spacer has 4 1/2 NPT ports with plugs. Replacement Part ALL99353 Base O-Ring ALL30375 Truck Freight- NO State Restriction-
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