EMS – EcoBoost Keyed Rotating Assembly at 12 o’clock with 5mm key

EMS – EcoBoost Keyed Rotating Assembly at 12 o’clock with 5mm key

The EMS 2.0/2.3 L EcoBoost Keyed Rotating Assembly is a purpose-built, premium bottom-end solution engineered for performance builders who demand precision, reliability, and durability in high-stress turbocharged engines. Designed from the ground up for EcoBoost applications, this assembly combines three core precision components into one cohesive unit for improved crankshaft retention, precise timing accuracy, and long-term durability.

At EMS, we understand that stock rotating components rely on friction or bolt torque to hold pulleys and sprockets in place, which can slip under aggressive boost, high rpm, or repeated rebuilds. The keyed rotating assembly eliminates that risk by using positive mechanical keyways to lock each major rotating part to the crankshaft for a more reliable and repeatable setup every time.

What’s Included

• EMS Keyed Damper (12 o’clock with 5 mm Key) – Reinforced harmonic damper machined with a robust 5 mm key at true 12 o’clock for secure crankshaft engagement and repeatable timing alignment, reducing the risk of damper slip.

• Ford OEM 2.0/2.3 L Crankshaft – Genuine Ford crankshaft built to OEM specifications, giving a strong, perfectly balanced foundation for performance and rebuild applications.

• Ford OEM 2.0/2.3 L Engine Timing Crankshaft Sprocket Gear – OEM timing sprocket gear that precisely engages the timing chain and works with the keyed rotating setup to maintain exact crank-to-cam synchronization.

Built into Every EMS BadAss Engine
This keyed rotating assembly isn’t an optional upgrade—it’s a standard component in all EMS BadAss engine builds. From our high-horsepower long blocks to race-ready short blocks, every BadAss engine benefits from improved timing integrity and bottom-end confidence thanks to the keyed damper, crankshaft, and sprocket setup.

Why It Matters
Accurate crankshaft and timing component engagement is crucial when pushing EcoBoost engines to their limits. Friction-only interfaces can slip over time, especially on high-boost or tuned applications, leading to incorrect timing, detonation, or even engine damage. By using keyed interfaces at critical rotation points, EMS ensures that your engine’s timing remains stable, repeatable, and durable under the toughest conditions.

Key Benefits

• Positive keyed engagement for crank pulley and timing sprockets

• Improved timing accuracy and repeatability

• OEM-spec crankshaft performance and strength

• Standard in all EMS BadAss performance engine builds

• Ideal for high-power, boosted EcoBoost applications

The EMS 2.0/2.3 L EcoBoost Keyed Rotating Assembly is your foundation for reliable performance when only the strongest bottom end will do.

Fitment: This assembly is engineered to fit the following EcoBoost platforms:

• Ford Mustang EcoBoost (2.3L models)

• Ford Focus RS (2.3L EcoBoost)

• Ford Focus ST (2.0L EcoBoost)

Call us (423) 500-4901 or

Email us at sales@emsinc-tn.com

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