Piston Ring Set 4.245 Bore - File Fit

The Piston Ring Set 4.245 Bore - File Fit from MAHLE PISTONS is designed for high-performance engine builders and serious mechanics who require precision-matched components for competitive or custom applications. This file-fit ring set is specifically engineered for applications that demand exact bore specifications and superior ring-to-bore clearance control.

When engine performance and reliability hinge on exacting tolerances, a properly fitted ring set minimizes blowby, reduces oil consumption, and optimizes compression dynamics across the full RPM range. Manufactured from premium iron with plasma moly coating, this kit features ring dimensions of 1.0 x 1.0 x 2.0 mm with standard tension characteristics that balance sealing effectiveness against ring wear and bore friction.

This ring set is ideal for engine builders restoring or upgrading large-displacement eight-cylinder engines where standard off-the-shelf rings may not meet tolerance requirements or performance targets. Professionals working on marine engines or high-output applications will find this product particularly beneficial, as it ensures optimal sealing geometry and prevents excessive side clearance that could compromise ring function.