Rubber Block Off Blank Plugs Heater Hose Water Pumps - Universal 1/2" 13mm x2 9313699735391 | eBay
Rubber Hose Plug For Coolant Line 3/4" 240Z 260Z 280Z | Z Car Depot Inc
HVAC Heater Hose Nipple Hole Plug-VIN: K GM GENUINE PARTS CANADA 15544596 | eBay
Coolant Hose Delete Plug | BMW E9X | BMW Cooling System — Condor Speed Shop
1955-1976 All Makes All Models Parts | PF1024 | Stainless Steel Heater Hose Fittings - 1/2" NPT - 5/8" i.d. x 1-3/4" L with 1/2" L Pipe Plugs | Classic Industries