Piston Ring Set 4.375 Gapls Top 1/16 1/16 3/16

The Piston Ring Set 4.375 Gapless Top 1/16 1/16 3/16 from Total Seal (Model M9190-130) is engineered for serious engine builders and high-performance 8-cylinder applications requiring precision compression control. Gapless top ring technology eliminates the weak point found in conventional ring designs, delivering superior sealing and blowby reduction across all engine speeds and loads. This file-fit kit is built for builders who demand exacting standards and are willing to invest in premium components that maximize power delivery and engine longevity.

Manufactured from ductile iron with a natural finish, this piston ring set features a 4.375-inch bore diameter and stacked thicknesses of 1/16, 1/16, and 3/16 inches across the three rings. The gapless top ring design eliminates traditional gap-related blow-by and combustion gas leakage, while standard tension characteristics ensure consistent ring-to-bore contact throughout the engine's operating range. Total Seal's file-fit construction requires precise honing to specification, allowing experienced builders to achieve optimal ring position and sealing geometry that cannot be matched by off-the-shelf rings.

Professional engine builders, racing teams, and restoration specialists rely on Total Seal piston ring sets for naturally aspirated and forced-induction performance builds. Installation requires careful bore preparation and attention to ring gap clearances; improper sizing or installation can compromise engine performance. This 8-cylinder kit weighs 1.2 pounds and is compatible with custom-built engines where bore diameter and ring specifications match the 4.375-inch standard. File-fit rings demand experienced installation—consult detailed engine rebuild specifications before ordering to confirm compatibility with your particular block and stroke combination.