Moroso 37800 - Plug Kit, Deck, Chevy

Water Pump Block Off And Filler Neck Kit Deck Plug Kit Wall Distortion Reduced Restrict Water Flow to Cylinder Heads • Upper cylinder wall distortion is greatly reduced when these 3/4" NPT plugs are installed in the water passage holes in the decks of Small Block and 90° V6 Chevy engines • Water holes must be tapped before the plugs are screwed in block must also be decked after installation • Plugs also restrict water flow to the cylinder heads by reducing size of water passage holes to 5/16" • Packaged six to a kit