Focus ST Intercooler Upgrade: Is It Worth It?
Heat soak killing your Focus ST's performance? Here's everything you need to know about upgrading your intercooler.
The Heat Soak Problem
The Focus ST's stock intercooler is adequate for normal driving, but push it hard — especially on track days or in summer — and you'll notice power dropping off. This is heat soak: the intercooler can't cool the charged air fast enough.
When to Upgrade
- If you're running a Stage 1 or Stage 2 remap
- If you track your car regularly
- If you notice power loss after sustained hard driving
- If you live in a warm climate
Top Intercooler Options
AIRTEC Motorsport
The go-to choice for most Focus ST owners. Their stepped core design offers excellent cooling without excessive pressure drop. Available in multiple finishes.
Forge Motorsport
Premium build quality with a bar-and-plate core. Slightly more expensive but excellent thermal efficiency.
Installation
Most aftermarket intercoolers are a direct bolt-on replacement. Budget 2-3 hours for a DIY install. You'll need basic hand tools and patience with the bumper removal.
Our Verdict
If you're remapped, an intercooler upgrade is one of the best investments you can make. It protects your engine and maintains consistent power delivery.
Shop intercoolers at Retro Fast Fords.