N3DA 2.3 EcoBoost — the heart of the Mk4 Focus ST

The fourth-generation Ford Focus ST moved the ST badge into the 2.3-litre EcoBoost era. Its N3DA turbocharged inline-four produces around 280 PS and 420 Nm, delivering considerably more torque than the preceding Mk3 ST250 while retaining front-wheel-drive hot-hatch character.

The engine uses modern Ford EcoBoost technology including direct injection, turbocharging and Ti-VCT variable cam timing, combining strong low- and mid-range torque with the higher specific output expected of Ford's current-generation performance engines.

For GasketKeys, the N3DA represents the latest chapter in a very clean Focus ST engine progression:

ALDA ST170 → HYDA ST225 → R9DA ST250 → N3DA Mk4 ST

This miniature gasket recreates the distinctive four-cylinder head-gasket profile as a compact engineering memento for Mk4 Focus ST owners and enthusiasts.

Engineering & Craftsmanship

• Industrial Grade Build: Precision laser-cut from premium 304 stainless steel with a durable brushed finish.
• Protective Frame: Presented inside a 3.3 mm CNC-machined PLY frame.
• Technical Precision: Cylinder bores, coolant passages and major gasket features are digitally mapped from the original head-gasket geometry.
• Letterbox Friendly: The slim under-5 mm packaging format keeps UK delivery simple and practical.

Those product-construction elements follow the uploaded GasketKeys framework.

A subtle Mk4 Focus ST memento

The Mk4 ST is a very different proposition from the earlier ST225.

Where the Mk2 became famous for its five-cylinder soundtrack, the Mk4 focuses on torque, boost response and modern EcoBoost performance.

That makes the gasket keychain a more interesting object than another ST logo: it represents the actual engine architecture that separates the Mk4 ST from an ordinary Focus.

6. Technical Specifications