mountune High Performance 1.6L MRX Fiesta ST Long Block

Mountune's extensive knowledge of the Ford EcoBoost engines coupled with our comprehensive motorsport experience provides the foundation for our premium 1.6L Ford EcoBoost long block assembly.

Each long block starts off as a brand new aluminum Ford Fiesta ST engine block strengthened with the latest Cylinder Support System then skillfully assembled with mountune forged pistons, forged h-beam connecting rods, and tri-metal racing bearings

1.6L MRX Long Block is topped with a mountune MRX Cylinder Head - Fiesta ST. A factory Fiesta ST cylinder block that has undergone our precision MRX machining service for the best possible performance, increasing intake airflow by 51% and exhaust airflow by 24%.

Our 1.6L EcoBoost MRX cylinder head also features high-performance black nitrided intake valves, sodium inconel exhaust valves, along with our motorsport valve stem seals, and V2 camshafts.

This long block is the perfect foundation for your Fiesta ST for high-boost applications including track-day use.

Cylinder Support System Information

The Cylinder Support System is a proven method of strengthening open deck engine blocks while maintaining OEM integrity. The support ring is made from aircraft grade 6061-T6 aluminum. It prevents cylinder cracking, walking, and bell-mouthing and features full support between each cylinder. 

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.