mountune High Performance 2.3L MRX Stroker Focus ST Long Block

Important Notice: Extended Lead Times Due to high demand and ongoing parts supply delays, our custom-built-to-order engines are experiencing extended lead times. We’re committed to quality and appreciate your patience. For the latest lead time estimates, please contact us.   Mountune's extensive knowledge of the Ford EcoBoost engines coupled with our comprehensive motorsport experience provides the foundation for our premium 2.3L Ford EcoBoost long block assembly. Each long block starts off as a brand new aluminum Ford Focus ST engine block then skillfully assembled with mountune Focus RS forged pistons, Focus RS forged connecting rods, tri-metal racing bearings, and a keyed OEM Focus RS crankshaft. Each High Performance 2.3L MRX Long Block is topped with a mountune MRX Cylinder Head - Focus ST. A factory Focus ST cylinder block that has undergone our precision MRX machining service for the best possible performance, increasing intake airflow by 44% and exhaust airflow by 19%. The moun