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Ford Focus ST MK3 | Stage 2 Tuning package

AET Motorsport

  • £1,94000
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Finance from a month.

(14.9% APR) representative

AET Motorsport Stage 2 package with PERON tune. 

This package allows you to customise your stage 2 upgrade specifically selecting from a range of intercoolers, downpipes and induction kits. 

This package make the most from your stock turbo Focus ST
Eliminates throttle closure issues and agitated throttle control associated with competitors tunes
Makes between 270-280whp on the factory turbo making well over 300hp at the flywheel

Fitting and dyno tested from £400 

The PERON Tune

PERON introduce the PERON Programmer to give you the power to flash your car with our ultimate performance tuning files and return your car to stock at any time you want. The PERON Programmer is an USB to OBD interface that quickly and easily reads your stock file and allows you to save / email that tune to us so we can build you a performance file.


Cobra Sport
Available in decat or sports cat

  • Sports Cat | FD42 Ford Focus ST250 performance exhaust. This Focus ST performance exhaust is made in 3"/76.2mm bore pipework and fits from the turbo to the centre section. This sports cat exhaust will enable you to pass a UK MOT emissions test or police road side checks.

  • Decat | FD43 Ford Focus ST250 performance exhaust

    Cobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality. This Focus ST performance exhaust is made in 3"/76.2mm bore pipework and fits from the turbo to the centre section.


  • Maximise the performance of your stock turbo...
    PERON introduce our Super Stock 3'' Turbo Downpipe made from 100% T304 stainless steel and produced out of 76mm / 3 inch unrestricted mandrel bent pipe work. If you are looking to maximise the power from your stock location factory or hybrid turbo Focus ST look no further than this beautifully tig welded downpipe. To maximise the performance of this component the PERON P3XX Stage 2 calibration is required; this will also remove any engine management lights.

AS Performance Decat

  • The Original Catalyst and down pipe , unlike the older ST225 and Focus RS mk2, are made in one piece. This new design features some restrictive bends and an exit bore size of only 55mm. With a new bore size of 70mm the new AS performance Replacement Down Pipe has over 50% more capacity.

Induction kits


  • Official BTCC ITG Motosport Filter Housing
    76mm perfectly mandrel ment alloy intake tubing
    High spec UK manufactured silicon hose with super smooth transitions 
    Short direct path for air flow
    High quality world leading multi layer foam design
    Filter size increase by over 50%
    Increased turbo intake noise and divertor valve discharge without being overpowering 
    PERON proven to over + 300HP - we use this kit on all stock turbo and hybrid turbo conversions 

AS Performance

  • Expect to see gains of 5-10bhp compared to the original Airbox.
    Enhanced induction sound, great looks and loud recirculation dumpvalve noise on let off and only £295.00

    • Features.
    • Removes ugly original plastic & restrictive airbox
    • Adds power and torque, 
    • more responsive and exciting driving experience
    • Enhanced induction sound and turbo recirculation noise (dumpvalve 'psssh')
    • free flowing Airfilter & optional k&n dry charger filter cover
    • CNC maf sensor boss with AS engraved logo
    • Powder coated alloy heat-shield with 80mm cold feed pipe which directs air to bottom of filter
    • Adds style to your engine bay
    • Easy fitting



Have used their fully proven 60mm bar 'n' plate core with tapered end tanks, this same spec has been tested @ 300+bhp and consistently provides cooling for 400+ bhp cars, maximum tests on this spec of core and tapered end tanks have also been tested to 540 bhp with an impressive 38 degree intake temperature.


  • Features
  • Fully proven race spec 60mm bar 'n' plate core design
  • Cast alloy tapered end tanks, ensures smooth airflow with maximum strength
  • Comes standard with the RS style scoop
  • No extra hoses required, fits to standard hoses
  • Removal of Ford Grill shutters is required, simply un-bolt and re-fit loom to AIRTEC bracket supplied
  • Fitting should take no longer than 1-2 hours
  • Available in Polished or Pro-Series Satin Black
  • Available with AIRTEC logo in several colours free of charge
  • 1x Airtec Intercooler & 1 x RS Style Scoop

Pro Alloy

Intercooler upgrade for the 4 cylinder 2.0 Ecoboost ST 

    • Full width design
    • Easy fitment
    • Supplied with a chassis mount kit
    • Does not block the air flow to the water cooling radiator like some other aftermarket designs This is because our cooler utilises a THINNER core than standard to aid the ambient air flow whilst increasing the internal air flow with our taller core by 16% 
    • Supplied complete with alloy ram air ducts
    • Fits with standard hoses
    • Note ... this kit requires the removal of the oem grille shutters and therefore the bumper will need to be removed for fitting.


PERON XL Super Stock

With lots of companies offering performance intercoolers for the Ford Focus ST 2.0T, PERON needed to produce the ultimate intercooler with the highest quality core available. The PERON XL Intercooler is proudly designed and manufactured in the UK to the highest standard.

Better Than The Rest...
When boost and ignition is ramped up on the stock turbo, the standard intercooler simply can not cope with the increased temperatures. We wanted a core that is a step up from the competitors and commissioned the production of our new 'stuffed fin' heat exchanger. A number of designs and mock up intercoolers were produced and tested until the we settled on our final production item. This intercooler fin design has been specified designed for the Ford Focus 2.0T Ecoboost to improve upon the original design by allowing far better cooling potential by using the latest in core technology and having a much greater surface area without any negative elements such as pressure drop or restrictive flow to the water radiator. On our P3XX calibration our PERON XL intercooler gave over 10hp / 10ft-lb at the wheels with charge temperatures never breaching 38c on the dyno run after run.

Spec List
Direct bolt-on requires NO cutting or trimming
Fills all available space to front of car, the largest FMIC available
Easy fitment
Does not block air flow to water radiator
Eliminates issues with heat soak and dramatically reduces charge temperatures of standard or highly tuned vehicles
Will bolt up to stock piping or most aftermarket pipe kits that are designed for the stock intercooler
Black thermo paint, this finish will help the intercooler perform not be detrimental to the fin function
OEM-like fit and finish
Super light weight core and end tanks
All PERON intercoolers are pressure tested after assembly to 30 psi


PERON Stage 2 dyno | Producing 277whp and 357ftlb

Cobra Decat
Airtec Intercooler
PERON Stage 2 file



Finance Representative Example
36 months

Monthly Payment


Total Amount Payable


Representative APR

Monthly Payment£37.70
Loan Repayment£0.00
Cash Price£2,000.00
Cost of Loan£285.20
Deposit to Pay£970.00
Total Amount Payable£1,450.00
Loan Amount£2,285.20
Number of Monthly Payments36
Only available to UK residents over 18, subject to terms and conditions. To apply for finance, please add the product to your cart, proceed through checkout and select "Apply For Finance" as your payment option where you can complete the application form online.

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