Amazon.com: Water Pipe O-Ring for Select Subaru, Toyota, Scion, and Saab Vehicles | Seals Water Pipe Outlets to Both Sides of Engine Block (Two Required Per Car) | OEM# 80693-3010 | Heavy
Hoops for High Horsepower - Engine Builder Magazine
Get Into The Groove: Contain Combustion With O-Rings Or Fire Rings
Amazon.com: Mr. Gasket 2557 O-Ring Style Water Neck, Chevy : Automotive
Quick Tech: The Ins and Outs of Copper Head Gaskets - DSPORT Magazine