Ford Focus RS/ST225 MK2 Airtec Motorsport 2.5 Inch Big Boost Pipes with 70mm Cold Side

  • Sale
  • Regular price £365.00
Tax included.

The 2.5″ big boost pipe kit is a must for all remapped RSs, 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 silicone hose joiners.
  • NEW! Now comes with 70mm cold side hose to fit standard size throttle body expanding up to 70mm
    Please Note: This is a Symposer Delete Item

Will fit With 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 increases over the standard Ford pipes and these gains were achieved by simply bolting on the kit.
This kit is designed for BIG BHP Focus RS’ and will work best on 375bhp and over.

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

Please note: Custom colours (white, yellow, orange, grey, purple and both greens) are made to order, please expect a 5-10 day delay on custom colours.
Peak show times may be a longer 7-10 day delay.

Pipework only available in Pro Series Black 

Choose from options throttle body size:
Standard Throttle Body  (63mm)
Uprated Throttle Body (70mm)

For Focus ST225 - MUST be fitted with 2.5" outlets on intercooler. Stock is 2". Will NOT fit Focus ST Stage 1/2 intercooler. WILL fit stage 3 intercooler.