Wiseco K20/24 87.5mm Bore Pistons with 13.7:1 compression optimize naturally aspirated performance and fuel efficiency. Each complete kit contains four pistons, wrist pins, locks, and rings for direct installation. Manufactured from proprietary forgings, these pistons provide the lightweight construction and strength necessary for high-RPM naturally aspirated applications. Engineering excellence includes precision valve pocket design, sophisticated crown architecture, and steel nitride/Napier XX ring technology for durability and heat dissipation. The refined skirt geometry minimizes friction and side loading while preserving structural integrity—ideal for builders pursuing maximum power output in naturally aspirated K-series engines without boost complications.
