AIRTEC Stage 3 Intercooler ATINTFO34 – MK2 Ford Focus ST225


High flow 60mm core intercooler with air ram scoop and 2.5″ pipework

Ideal for cars running 300-400bhp



AIRTEC Stage 3 Intercooler ATINTFO34 – MK2 Ford Focus ST225

As part of the expanding Focus ST product range, AIRTEC Motorsport is proud to launch their Stage 3 intercooler upgrade suitable for track or fast road use.

In order to ensure there is no noticeable loss in performance during extended periods of hard driving, AIRTEC have taken their hugely popular Stage 1 Focus RS intercooler and modified it to fit within the ST bumper and added 2.5″ Pro Hoses (intercooler to inlet manifold connector and Pro Hoses intercooler to ST boost hose).

Their solution to increasing the intercooler’s size and performance within the confines of the limited space behind the bumper is based upon a 60mm core that’s twice as high and almost 100mm longer than the standard item. This offers a massive increase in overall capacity in comparison to the original intercooler, as well as a 127% increase in frontal area over standard, which allows it to make the most of the air flow provided.

Together with high-flow end tanks and air diverter scoop to ensure flow is directed correctly and efficiently, the AIRTEC Motorsport intercooler offers much greater efficiency and volume over standard.

Matched with the 2.5″ hard boost pipe upgrade that replaces the OEM 2″ pipework. Increasing the dimeter reduces restriction and improves flow, which in turn sees an instant increase in power. This is seen during back-to-back dyno testing which saw a huge 11.8bhp and 9lb ft of torque gain simply by fitting the new pipework.


  • Huge high flow 60mm core
  • 127% increase in frontal area for improved air flow
  • Air Ram Scoop forces air directly into core of intercooler
  • Smooth-flow end tanks
  • AIRTEC logo brackets
  • 2.5″ pipe work improves flow
  • Increased BHP & torque
  • Pro-Series Black

Please Note: Now only available in Pro-Series Black


Important Note: The pre-facelift ST has a different radiator compared to the facelift & RS, this makes the left hand cold side silicone hose very tight against the radiator cradle. AIRTEC recommend removing the radiator cradle bolt, levering the cradle to the right and re-drilling a new hole & then replacing the bolt. It’s very simple and easy to do, but is necessary to give you extra clearance for the bigger 2.5″ cold side hose. If you are still not happy with the fit, they recommend fitting an RS radiator.



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Additional information

Hose Colour

Gloss Black, Kawasaki Green, Orange, Performance Blue, Race Red, Ultimate Green, Vivid Pink

AIRTEC Logo Colour

Blue, Green, Orange, Pink, Plain / No Logo, Purple, Red, Silver, White, Yellow

Cold Side Boost Pipe

With Symposer Outlet, Without Symposer Outlet