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Engines built to order

Estimated build time is currently 10-12 weeks

Please note, that there may be circumstances that may delay the build process including (but not limited to) part shortages and backorders beyond our control.
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Installation Guides

Find the important information you need to install this engine into your build, as well as our recommended break-in procedure.

Install Guides
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Mountune USA

mountune High Performance 2.3L Focus RS/Mustang Short Block

mountune High Performance 2.3L Focus RS/Mustang Short Block

SKU: 6069-SB-230

$5,578.99
$6,199.00 $5,578.99
Sale Sold out

Mountune's extensive knowledge of the Ford EcoBoost engines coupled with our comprehensive motorsport experience provides the foundation for our high performance 2.3L Ford EcoBoost short block assembly.

Each short block starts off as a brand new aluminum Ford Focus RS open deck engine block which can be strengthened with the Cylinder Support System before being skillfully assembled with mountune forged pistons, forged h-beam connecting rods, tri-metal racing bearings, and a lightweight forged crankshaft.

This engine specification is designed for typical track day use and those running up to 550 hp power levels with the proper supporting modifications.

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  • PARTS INTENDED FOR COMPETITION USE ONLY
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  • PROPOSITION 65 WARNING
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Additional Information:

Engine Specifications

  • Product Code: 6069-SB-230
  • Base Engine: 2.3L Ford Ecoboost
  • Bore x Stroke: Ø 87.5 mm x 94 mm
  • Compression Ratio: 9.5:1
  • Piston: Upgraded Forged Piston
  • Connecting Rod: Mountune Forged H Beam Rod
  • Crankshaft: Focus RS OEM
  • Main Bearing: Mountune Race Tri-Metal
  • Main Bolts: OEM High-Tensile Strength
  • Application: Focus RS 2016-2018, Mustang 2015-2023

Cylinder Support System

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.

Warranty Coverage

Mountune is confident in our products and services and we proudly stand behind our workmanship. Therefore, we offer a limited warranty against defects in workmanship or materials, covering both parts and labor, for a standard period of 1-Year/12,000-Miles.

For more information see, terms & conditions.

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