Perf. Piston Ring Set 4.070 Bore 1.0 1.0 2.0mm

The MAHLE PISTONS Performance Piston Ring Set 4.070 Bore 1.0 x 1.0 x 2.0mm is a precision-engineered ring kit designed for high-performance engine builds requiring exact bore dimensions and controlled gas sealing. This file-fit ring set delivers the compression and blow-by control necessary for sustained power output in 8-cylinder applications where OEM or stock-tension rings fall short of performance demands.

The 1.0 x 1.0 x 2.0mm thickness specification defines a traditional ring stack engineered for reliable sealing across the operating RPM range typical of street and light competition engines. The steel construction and standard-tension design provide consistent ring-to-bore contact while minimizing friction losses. File-fit specification means each ring set requires final honing to match the exact bore finish of your block—a critical step that ensures optimal sealing and prevents premature wear. MAHLE's manufacturing tolerances and material selection make this ring set suitable for naturally aspirated and moderately boosted applications where precision and longevity matter equally.

This ring kit is specified for 8-cylinder engines requiring the 4.070-inch bore diameter—a common displacement point in modern performance builds. Buyers undertaking block preparation, overbore machine work, or engine rebuilds with upgraded pistons will find this MAHLE Performance series ring set addresses the sealing and durability requirements of mid-range power builds. Installation requires proper ring gap filing and bore matching to achieve the intended performance characteristics and ring life.

Part number 4070MS-112 identifies this specific ring set configuration within MAHLE's performance product line. Weight and compact dimensions facilitate easy shipping and storage for engine builders maintaining inventory across multiple project applications.