Dreamscience ST250 Intercooler

Unlock the full performance potential of your Ford Focus ST MK3 with the Dreamscience Focus ST250 Intercooler, developed in partnership with AIRTEC Motorsport. This high-efficiency, motorsport-grade intercooler is a direct replacement for the factory unit, designed to deliver maximum cooling efficiency, minimal boost loss, and consistent power — even during the most demanding driving conditions.

Engineered for Power and Reliability

Manufactured by AIRTEC to the highest standards, the Dreamscience Focus ST MK3 Intercooler features a 60mm thick, single-pass bar-and-plate core with tapered cast end tanks for optimized airflow and unbeatable strength. Each core is vacuum brazed in a controlled atmosphere to meet ISO9001 quality assurance standards, ensuring long-lasting reliability and consistent performance.

After extensive dyno and road testing, this intercooler proved its capability — maintaining after-cooler temperatures between 35–40°C even after multiple hard runs on 300bhp+ setups. The result: virtually no boost loss and stable power delivery throughout your driving session.

During development, the intercooler was tested up to 540bhp with intake temperatures averaging just 38°C, demonstrating its ability to handle high-performance and Stage 3+ builds with ease.

Performance Proven on Dyno and Road

• Dyno-tested Dreamscience Focus ST250 made 294.3bhp with the AIRTEC Stage 2 Intercooler, AS Performance Intake, and cat-back exhaust.

• Ideal for Stage 2, Stage 3, or Big Turbo conversions such as the Dreamscience Ultima setup.

• Consistent cooling performance ensures no heat soak and sustained power delivery under continuous hard use.

Designed for Perfect Fitment

Despite the huge increase in cooling capacity, this ST MK3 Intercooler fits neatly behind the standard bumper — no cutting or trimming required. It connects directly to the OEM boost hoses, with only the removal of the Ford grille shutters (simply unbolt and refit the supplied AIRTEC bracket).
The comprehensive kit includes all brackets, fittings, and full installation instructions, with fitting typically completed within 1–2 hours.

Key Features

• 60mm thick, track-proven bar-and-plate core

• AIRTEC cast end tanks for maximum airflow and durability

• Integrated Air Ram scoop directs airflow straight into the core

• Lightweight, high-flow design with virtually zero pressure drop

• Pro-Series Satin Black finish (with or without AIRTEC logo)

• Optional Dreamscience Motorsport stencil available in multiple colors

• 3-year unlimited mileage warranty

• Fits both Pre-Facelift and Facelift Focus ST MK3 models

• Supports up to 540bhp+

Dimensions

• Width: 945mm

• Height: 320mm

• Depth: 60mm

The Ultimate Cooling Solution for the Focus ST 250

Whether you’re running a remapped ST, a Stage 3 turbo kit, or a full performance build, the Dreamscience x AIRTEC Focus ST MK3 Intercooler delivers lower intake temperatures, faster recovery times, and improved reliability.
This is the essential upgrade for any performance-enhanced Focus ST 250, ensuring your car stays cool, consistent, and powerful on road or track.

Now Available as an optional upgrade with the DS Intercooler: Pro Hose / A.S 2.5-inch Big Boost Pipe Kit.

Features:

• Hot side (turbo to intercooler) is made from 2.5″ lightweight alloy and connected with Pro Hoses 5 ply silicone hose joiners.
• Direct replacement! No modification needed.
• Excellent fitment with the Dreamscience Intercooler
• Designed to extract even more power out of your remapped ST. This modification would be ideal for customers running the Ultima map looking to achieve around 300bhp+.

All pipes have swaged ends to stop the pipes blowing off on higher power cars..

Fitting takes 1 – 2 hours.

Fitting

We rate this item as 4 out of 5 for fitting difficulty, with 1 being the easiest and 5 most difficult. Full detailed fitting instructions are included with this product.

We also offer a full fitting service at our dreamscience HQ in Hull, UK, priced at £75.00. This must be selected with your order, and we will then contact you to arrange a suitable time. Please note if you require this service then you must choose collection as your delivery method when going through the checkout or you’ll still be charged for delivery!

For any DIY fitting advice please call our tech helpline to speak to our Qualified technicians on +44 1482 224433. Or email us on Sales@dreamscience.co.uk

Features

Dreamscience ST250 Intercooler (by Airtec)

– Hand made in the UK.
– Full Alloy sheet construction.
– Perfect wall thickness, ensuring maximum strength and efficient cooling.
– High Flow Square tube and Fin design.
– Direct fitment using the OEM Hanging points.
– Available with Dreamscience Stencil.