Piston Ring Set 4.315 1.5 1.5 3.0mm

The Piston Ring Set 4.315 1.5 1.5 3.0mm is a precision-engineered component designed for high-performance engine rebuilds and restorations. Built by MAHLE PISTONS, a trusted manufacturer in the automotive aftermarket, this ring set is essential for mechanics and engine builders tackling serious displacement work, racing applications, or complete engine reconditioning. Whether you're rebuilding a stroker engine, upgrading to oversized pistons, or restoring a classic powerplant, this piston ring set delivers the sealing integrity and durability required for reliable long-term operation.

The 4.315-inch bore diameter accommodates larger-displacement builds, while the three-ring configuration—featuring 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring—provides optimal compression sealing and oil control across a wide RPM range. The 1.5mm thinner top and second rings reduce ring mass, allowing faster piston acceleration and lowering inertial losses in high-RPM environments. This geometry is particularly effective in performance and racing engines where reduced friction and quick response are critical. MAHLE's manufacturing standards ensure precise ring gap tolerances and consistent cross-sectional dimensions, promoting uniform bore wall contact and preventing blow-by that compromises power and cylinder condition.

This piston ring set is ideal for engine builders, professional mechanics, and enthusiasts completing full-bore rebuilds where bore size is 4.315 inches. Proper ring end-gap clearance and bore wall finish are critical during installation—verify your specific engine's requirements and consult torque specifications for ring grooves. The lightweight design excels in naturally aspirated and forced-induction applications where thermal stability and rapid response translate to measurable performance gains. Stock this essential component for any serious engine program involving oversized or stroker pistons in the 4.3+ inch bore range.