A cast iron ring carrier adapted to the high cylinder pressures is common to each piston. (greencarcongress.com)
Lange - de-boeuf, Europe, c. 16th century, long triangular blade with rudimentary median ridge, forge - welded socket with base ring mounted on an octagonal fruitwood pole with iron ring collar on base, More... (skinnerinc.com)
To support the high cylinder pressures that come with turbocharging, the crankshaft and connecting rods are made of forged steel and the pistons are made of a tough aluminum alloy with a cast iron ring groove insert. (cheersandgears.com)