Piston Ring Set 4.445 Moly 1/16 1/16 3/16

The Piston Ring Set 4.445 Moly 1/16 1/16 3/16 is engineered for high-performance engine rebuilds and custom automotive builds where precise ring dynamics directly impact compression, blow-by control, and power output. Whether you're restoring a vintage engine, upgrading a performance platform, or executing a full bottom-end refresh, this ring set delivers the geometric precision and material science that serious engine builders demand. The 4.445-inch bore diameter positions this set for mid-range displacement engines common in street rods, truck builds, and motorsports applications where reliability and repeatability matter.

This piston ring set features moly (molybdenum) face coatings on the compression rings—a critical detail for any builder focused on durability. The 1/16-inch top compression ring thickness, paired with a matching 1/16-inch second compression ring, optimizes ring-to-land contact while minimizing radial thickness to reduce friction and parasitic drag on the rotating assembly. The 3/16-inch oil ring provides superior scraping efficiency and drain-back performance in high-rpm environments. Moly-faced compression rings reduce friction and wear during initial break-in while improving sealing geometry under boost or sustained high-load conditions, making this set ideal for naturally aspirated, turbocharged, or supercharged applications.

Serious engine builders and performance mechanics choose this ring geometry for applications demanding tight bore tolerances and predictable ring behavior across a range of operating temperatures. The 1/16 / 1/16 / 3/16 thickness profile works seamlessly with modern honing practices and standard piston grooves, ensuring proper side clearance and radial tension. Installation requires careful ring end-gap verification with your specific block, bore finish, and intended power band to guarantee optimal sealing. This set delivers professional-grade performance for those committed to engine longevity and peak cylinder pressure efficiency.