Piston Ring Set 4.155 Gapls Top 1/16 1/16 3/16

The TOTAL SEAL Piston Ring Set 4.155 Gapless Top 1/16 1/16 3/16 (ML0690-35) is a precision-engineered eight-cylinder piston ring kit designed for high-performance engine builds and restorations. Manufactured from ductile iron in natural finish, this gapless top ring configuration delivers optimized compression sealing and reduced blowby in applications requiring file-fit installation and low-tension ring dynamics.

The 4.155-inch bore specification matches popular small-block and mid-block engine platforms. The gapless top ring eliminates traditional ring gap gaps entirely, reducing combustion gas leakage past the ring lands while maintaining structural integrity under sustained high-rpm operation. The second and third rings measure 1/16 and 3/16 inches in thickness respectively, providing balanced oil control and compression retention across the full ring stack. Low-tension design reduces friction and parasitic losses without compromising seal integrity—a critical advantage in engines where ring tension has been tuned to OEM or performance specifications. File-fit installation allows precision customization to actual piston and bore tolerances, ensuring optimal ring-to-groove and ring-to-bore clearances.

This ring set serves engine builders, restoration specialists, and performance enthusiasts rebuilding eight-cylinder naturally aspirated or moderately boosted powerplants. Ductile iron construction provides durability under sustained combustion pressures while maintaining the surface finish characteristics needed for proper ring seating during break-in. The TOTAL SEAL Piston Ring Set ML0690-35 is compatible with applications requiring precise 4.155-inch bore rings and low-tension, file-fit installation protocols.