Piston Ring Set 4.395 Classic 1/16 1/16 3/16

The Piston Ring Set 4.395 Classic 1/16 1/16 3/16 (MPN: CR2690 35) is a precision-engineered ring kit designed for high-performance classic race engines requiring exact bore matching and file-fit installation. Built for 8-cylinder applications with a 4.390-inch bore specification, this classic race piston ring set delivers the compression sealing and oil control characteristics essential for sustained engine performance in competition and restoration builds. Serious engine builders and race shops rely on properly-sized piston rings to maintain cylinder pressure and prevent blow-by.

This ring set features ductile iron construction with plasma moly coating, a combination that provides superior wear resistance, thermal stability, and longevity under high-rpm and high-combustion-pressure conditions. The three-piece configuration—1/16-inch top ring, 1/16-inch second ring, and 3/16-inch oil control ring—follows classic race engine specifications and requires file-fit installation to achieve proper end-gap clearance for your specific bore diameter. Standard tension characteristics ensure reliable ring seating without excessive groove pressure, critical for protecting cylinder walls and maintaining oil consumption within design parameters.

Engine rebuilders, restoration specialists, and race engine assemblers benefit most from this classic race piston ring set when boring a block to 4.395 inches or when replacing worn rings in existing 4.390-inch classic competition engines. File-fit rings demand precision ring installation tools and careful end-gap measurement; consult your engine builder's specifications or cylinder bore documentation before installation. Compatible with 8-cylinder classic race engines built to these bore dimensions, this kit arrives ready for proper fitting and installation into your racing or high-performance classic engine project.