Induction Kit Buyer's Guide: Fiesta ST & Focus ST
Everything you need to know about choosing an induction kit for your Ford ST — from Ramair to Pipercross, AIRTEC to ITG.
Why Upgrade Your Induction?
A performance induction kit replaces the restrictive OEM airbox with a free-flowing filter, giving your turbo (or naturally aspirated engine) easier access to cold air. The result: sharper throttle response, a more exciting induction noise, and small power gains.
Top Picks
Ramair
Budget-friendly and effective. Their foam filters offer excellent filtration and are washable. Great entry-level option.
Pipercross
A step up in quality with their Viper carbon fibre airbox. Excellent cold air feed and looks the part under the bonnet.
AIRTEC Motorsport
Premium option with proper cold air ducting. Their Stage 2 kit for the Focus ST is particularly well-regarded.
ITG
The motorsport choice. Expensive but the gold standard for filtration and airflow.
What to Look For
- Cold air feed — A filter sitting in the engine bay soaking up hot air is worse than stock
- Filter quality — Foam or cotton gauze, both are fine. Avoid cheap paper filters
- Fitment — Make sure it's designed for your specific model year
- Heat shield — Essential for keeping intake temps down
Browse our full range of induction kits at Retro Fast Fords.