AIRTEC Motorsport 2.5-inch Big Boost Pipe Kit – Hotside ONLY

AIRTEC Motorsport brings you the 2.5″ big boost pipe kit for Mk2 Focus ST/RS.

This kit is for hotside pipework ONLY.

Complete kit only £209.95 includes stainless jubilee clips and fixings.

Airtec Part No: ATMSFO63/H
From £209.95 (inc VAT)
£174.96 (exc VAT)

Technical Data

The AIRTEC Motorsport big boost pipe kit is a must for all remapped RS’, everything you need is included in the kit.


  • Hot side (Turbo to Intercooler) is made from 2.5″ light weight alloy and connected with 5 ply silicon hose joiners.

Will fit the following intercoolers:

  • Pace
  • Pro-Alloy
  • Forge
  • Ford OEM
  • Direct replacement! No modding required.

Our 2.5″ hard pipe upgrade removes Ford’s 2.0″ restrictive boost pipes. We saw gains of 11.8 bhp & 9 lb/ft torque increase’s over the standard Ford pipes and these gains were achieved by simply bolting on the kit – including the additional cold side pipe.

This kit is designed for BIG BHP Focus RS’ and will work best on 375bhp and over, was tested on our 400bhp demo car.

All pipes have swaged ends to stop the pipes blowing off on BIG BHP Focus RS’.

Fitting takes approx 1 hour.

For Focus ST 225 – MUST Be fitted with 2.5″ outlets on intercooler. Stock ST intercooler is 2″.
*Will not fit Focus ST Stage 1/2 intercooler. Will fit focus ST Stage 3 intercooler.

Customers also purchased

AIRTEC Focus MK2 ST Stage 1 225bhp to 325bhp – Gen3 60mm core

Latest design from Airtec, Improved power, Improved Torque & Improved looks! Available in pro-series black or natural silver Easy fit and easy BHP bolt on upgrade! The original and still the best!

Airtec Part No: ATINTFO13

From £249.95 (inc VAT)
£208.29 (exc VAT)

In Stock

Select options

Full Details >

AIRTEC Motorsport Air-Con Delete Kit for Mk2 Focus ST/RS & Volvo C30 T5

Reduces parasitic loss, removes unwanted weight and de-clutters the engine bay. Please note: This is recommended for Motorsport use only and is not intended for road use. 

Airtec Part No: ATMSFO75

£295.00 (inc VAT)
£245.83 (exc VAT)

In Stock

Add to basket

Full Details >

Focus ST Mk2 225 – Silicone Dump valve fitting hose, 5 ply design

The Easiest way to Fit a Dump valve to your ST225 or RS Mk2 Available in a variety of colours. Accepts Bailey and all?other Dump valves Part No: PH/DVLFO1

Airtec Part No: PH/DVLFO1

From £35.00 (inc VAT)
£29.17 (exc VAT)

In Stock

Select options

Full Details >

AIRTEC Alloy Radiator Upgrade for Focus Mk2 ST and RS

We tried a 40mm core and where it worked well but on track we could still see improvements were needed and so we opted for a huge 50mm core 'normally found on our Cosworth radiators' it was perfect! A must for fast road & Track day Focus ST's & RS Models  

Airtec Part No: ATRADFO13

From £495.00 (inc VAT)
£412.50 (exc VAT)

In Stock

Select options

Full Details >