4.625 CS Piston Ring Set .9 .9 3.0mm

The 4.625 CS Piston Ring Set .9 .9 3.0mm from TOTAL SEAL is engineered for serious engine builders and high-performance mechanics who demand precision ring control and extended ring life. This piston ring set addresses the critical demand for reliable sealing in 4.625-inch bore engines, whether you're rebuilding a street performance build or maintaining a well-tuned race engine. TOTAL SEAL's CS (Conventional Steel) design has earned respect across the automotive community for consistent blowby reduction and improved combustion efficiency.

The .9mm top ring and .9mm second ring configuration, combined with a 3.0mm oil ring thickness, delivers optimal gas sealing while minimizing friction losses that rob horsepower and increase heat rejection. This three-piece design allows each ring to specialize: the top ring handles maximum combustion pressure and temperature, the second ring manages blowby escape, and the oil ring prevents excessive oil consumption. TOTAL SEAL's manufacturing tolerances and ring material selection ensure proper ring-to-groove clearance across a wide temperature range, critical for both cold-start durability and sustained high-rpm stability.

Engine builders working with small-block and mid-displacement platforms benefit most from this ring set when targeting reliable horsepower in naturally aspirated or moderately boosted applications. Installation requires proper ring gap filing to your specific cylinder bore finish and piston design—a non-negotiable step that separates professional rebuilds from marginal results. Verify your piston groove dimensions and cylinder bore finish specifications before ordering to ensure this 4.625 CS Piston Ring Set .9 .9 3.0mm delivers the seal integrity your engine deserves.