Manley 04+ Subaru WRX/STi (EJ257) 99.75mm Bore 1.2mm x 1.2mm x 2.0mm +.25mm Oversized Ring Set

The Manley 04+ Subaru WRX/STi (EJ257) 99.75mm Bore +.25mm Oversized Ring Set is a high-performance piston ring kit designed to provide a reliable and durable seal for Subaru EJ257 engines. Manufactured by Manley Performance, this set includes premium steel top rings, ductile iron top rings with plasma-moly inlay, and Napier-style second rings. These components are engineered to ensure optimal sealing, reduce blow-by, and enhance engine longevity. The rings are meticulously crafted to meet the demands of high-performance applications, offering excellent wear resistance and consistent performance across various engine builds.

This ring set is compatible with 2004 and newer Subaru WRX and STI models equipped with the EJ257 engine, covering a bore size of 99.75mm. It is suitable for both street and track use, providing a direct replacement or upgrade for stock rings. The kit includes all necessary components for installation and is ideal for rebuilds, performance upgrades, or restoring engine compression. Designed for engines requiring a .25mm oversize bore, this set ensures precise fitment and reliable sealing in high-performance and demanding driving conditions.