Piston Ring Set 4.380 Bore 1.5 1.5 3.0mm

The Piston Ring Set 4.380 Bore 1.5 1.5 3.0mm from MAHLE PISTONS is designed for high-performance automotive applications, particularly for enthusiasts and mechanics focused on rebuilding or upgrading large-displacement engines. This ring set is ideal for those working on 440 big-block engines and similar oversized piston applications, ensuring precision ring sealing and effective blow-by control.

Engineered with a ring pack configuration of 1.5mm top and second rings, along with a 3.0mm oil ring, this set optimizes blow-by sealing while managing thermal stress. The advanced iron composition and precision-finished ring groove tolerances contribute to consistent bore wall contact, minimizing friction losses. The staggered ring end-gap design further enhances performance by preventing ring flutter during high RPM and boost conditions.

This piston ring set is particularly beneficial for engine rebuilders, hot rodders, and drag-racing teams looking to assemble performance powerplants. Its design supports both classic and modern platforms, making it a versatile choice for various performance builds. Proper installation requires honing the cylinder bore to the correct surface finish for optimal performance.