Piston Ring Set 4.000 Classic 1.5 1.5 3.0mm

The Total Seal Piston Ring Set 4.000 Classic 1.5 1.5 3.0mm (SKU TOTCR0684-5) is a precision-engineered ring kit designed for classic race engine builds. This file-fit piston ring set delivers the seal integrity and blow-by control demanded by competitors running small-block engines at high RPM. The classic Total Seal design combines ductile iron construction with plasma moly facing to balance durability against cylinder wall wear while maintaining consistent compression sealing across the engine's operating range.

Each ring in this eight-cylinder kit features 1.5mm top ring thickness, 1.5mm second ring thickness, and 3.0mm oil ring thickness—a proven geometry for classic racing applications. The 4.000-inch bore specification ensures compatibility with common small-block platforms used in circle-track racing, bracket racing, and vintage engine restoration. Standard tension rings provide the right balance of sealing force without excessive friction, critical for maximizing power output while extending engine life. The plasma moly surface treatment resists scuffing during break-in and reduces initial wear, allowing the rings to seat quickly and maintain sealing pressure over extended race seasons.

Builders and engine shops select Total Seal rings for competition engines where every tenth of a percent of compression retention translates to measurable power gains. The file-fit design requires honing or finishing to the specific bore diameter, ensuring optimal ring-to-wall clearance and preventing flutter at peak boost or RPM. This piston ring set is ideal for engine builders preparing fresh or rebuilt short blocks for race duty, and for enthusiasts restoring classic high-performance engines to original or period-correct specifications. Order the Total Seal Piston Ring Set 4.000 Classic for your next engine build or rebuild project.