TXX Stage 3 to 4.5 Turbo Kit

£1995 (£1,662.50 ex vat) IN STOCK Finance Options Available
injecotrsTXX graphTXX Graph 2pump flow chartfocus st225 turbo blanket
TXX graph
TXX Graph 2
pump flow chart
focus st225 turbo blanket

TXX Stage 3 to 4.5 Turbo Kit

£1995 (£1,662.50 ex vat) IN STOCK Finance Options Available


5.00 out of 5
Read what our customers say

Tune Options. *

Fitting Service (Hull UK) *

Add 340lph High Flow Fuel pump unit *

See write up below.

RS Oil Cooler? *


Add PH2 Newman Cams to your Turbo Kit.

Adding the Cams to your build will make the car breathe and make a smoother bhp curve with better peak BHP. We remove the Cylinder head and re-shim the cam followers to ensure 100% Performance.

Oil and Filter Upgrade *

Fully Synthetic Oil

Rolling Road (Hull UK) *

Funk Motorsport Titanium Turbo Blanket.

Reduce Engine Bay Temps by up to 50%!!!

More Info


5.00 out of 5
  1. Daniel

    This thing is absolutely the nuts ! Can’t fault it, had it on a year and it still surprises me with the punch it gives when the car hits 4000rpm. Thing goes like a rocket. I would highly recommend this and to have it done by the guys at dreamscience. Top lads and always helpful

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Product Description

TXX Stage 3 to 4.5 Turbo Kit 

This kit is to be added to your Stage three set up to make the new TXX Set up. This Kit is designed to work with Standard internals, no more modifications over this kit should be made if reasonable reliability is to be achieved.

UP TO 385 Bhp and 410FtLb of torque….
The DS ST Stage 4 TXX Upgrade kit takes the Focus ST225 to a whole new level with unrivaled performance for your Focus ST225.

What is included in the baseline TXX Stage 3 to 4.5 package?

  1. DS-AET-K16/K24
  2. 550cc multi hole Bosch fuel injectors, set of 5
  3. TXX Remap.

Full fitting and individual setup of your vehicle is available as an option below, or we can mail order this entire kit. The fitting price listed in the options below also includes new Downpipe bolts, Down pipe Gasket, Copper Washer Seals, Super+ Coolant, and new Turbo Exhaust Manifold gasket.

Below is a more detailed description of all the components included in the TXX Turbo package.

Dreamscience DS TXX K16 Hybrid Turbo upgrade – Dreamscience have worked closely with AET-Turbos over the last 3 months to co-develop a New generation of Hybrid Turbo upgrade for the Focus ST225 which develops great performance, reliability and value for money. We have incorporated a Forge actuator and Forge Motorsport re-circulating dump valve to this turbo unit and have increased the size of the compressor wheel and machined out the Housings to accept the new Turbine and Compressor wheels in addition, the entire unit has been ported and polished to increase the overall efficiency of the unit. After intensive testing and many specification changes we have now signed off the DS TXX k16 unit for production as below.

IMPORTANT – Please note that this is a turbo has an exchange price. For customers who select fitting at dreamscience this is mandatory and is reflected in the price. For mail order customers there is a £185 surcharge which covers your turbo repair bill. If any repairs are required to be made to your old Turbo over the usual, we will deduct the additional costs from your Surcharge. Once the Turbo has been Inspected we will refund the difference.

The supply of new down pipe bolts, gasket, copper washer seals, and new turbo exhaust manifold gasket which are needed for fitting, normally priced at £29.17 + VAT. Mail order customers are able to then send us their original turbo to receive £200 + VAT refund (£240 including VAT for EU based customers) on receipt of their turbo in good mechanical order.

Bosch 550cc multi hole injectors x 5 – . These injectors are used as part of our stage 4 kit as from testing the standard injectors start to become inefficient at around 326Bhp +/- depending on temperature, commanded lambda, barometric pressure etc. These new 550cc injectors are a must recommended  for the new TXX. In all cases any injector bigger than 550cc will not run correctly and are unnecessary leading to ecu recalibration. At 380 real Bhp we still hold 11.5:1 AFR with the 550cc injector so any bigger is unnecessary and will not run as well.

TXX ECU remap – The TXX map has been developed to offer maximum performance while maintaining reliability and efficiency, as described by Performance Ford, “It’s designed to perform and feel as if it’s original factory fitment”. To use the TXX map it is mandatory to have 550cc injectors, an uprated oil cooler, and the DS TXX Turbo upgrade, we have not tested this on any other variant and have no plans to. The TXX map power delivery is designed to keep climbing as you go through the rev range, there is no massive lump in the low to mid range followed by the disappointment of losing all your power and boost. This map holds above 300Ftlb from 2000 rpm to just above 6500 rpm and has a very progressive / flat torque curve. As can be seen by the dyno graph TXX is controlled at low rpm to help a sensible torque figure which ensures the drive train is kept safe and in tact and as the rpm climbs all hell breaks loose. The biggest challenge when writing the new map over the last 12 months was to keep things sensible yet powerful. By using the 550cc injectors we are able to slightly over fuel the car to a steady commanded lambda of 11.5 to 1, this helps keep the cylinders cooler and also allows us to use more advanced ignition tables.

IMPORTANT – Please note that customers who select fitting will be offered a One Shot tune which installs the TXX tune onto your car, if you have an IMAP, handset or Ultra. Please select that from the drop down menus further down the page.

TXX Calibration 

These new tune files are only available for the latest vehicle ecu version 7BUG (393284), this can  be found by plugging into your car and reading your vehicle info.

If your Strategy number is;

– 378731

– 382957

You will need to update your ECU before the plus maps will work. This can either be organised at Dreamscience or your local Ford dealership.

Customers who buy this package via mail order have two options;

  1. We can email the File to your Stratagem iMap/Ultra handset.
  2. We can load the TXX Tune onto a blank iMap tuning handset so you can upload the file yourself.

Customers who do not have a tuning product already and wish to buy an Imap with the TXX map pre-loaded can do so by selecting one of these from the options below.

What mods are recommended to run this package?

  • Full CAIS
  • Stage 3 or 4 Intercooler set up
  • Full 3″ Exhaust System
  • RS Oil Cooler (Must have)
  • 340lph Fuel pump unit (highly recommended)
  • Block Mod
  • Upgraded Clutch

If you do not have any of the above, you can add in the drop down sections if required.

Optional Upgrades:

340lph Fuel pump unit. including RS Sender unit.
With this kit making so much power and the turbo is flowing so much air, we highly recommend adding this fuel pump to your package. The standard fuel pumps with old age can struggle to provide the fuel as efficiently as we’d like. What we have done with a handful of customers, is fit the TXX kit without the fuel pump and carried out fueling data logs on the standard fuel pump to make sure we are happy to release. In the instance that the standard fuel pump is under performing, we can load a revised version of the TXX tune with the recommendation to upgrade in the future. Once upgraded, we can re-load the strongest version of the map.

We have a off the shelf answer to fuelling your high powered Focus RS Mk2, this fuel pump upgrade is a straight swap for your standard pump unit and utilises a 340-litres per hour fuel pump!

Optional RS Oil Cooler Upgrade

Optional Oil and Filter Change
Select our optional oil and filter change below to finish off your dreamscience Stage 4 performance package. With the modifications carried out it”s obvious that the standard oil and filters fitted to your car will not suit the power increase. We”ll supply and fit superior grade oil and filters  to help protect your engine under the new higher performance levels you”ll be achieving.

Please note that as this is a fitted optional extra you should only add this option if you are intending to bring your car to our headquarters for fitting.

We also offer a full fitting service at our dreamscience HQ in Hull, UK, priced at £312.50 + VAT (£375). 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!

If you do not choose to have your upgrade fitted at dreamscience then remember there is an additional £200 + VAT (£240) refundable deposit until we receive your old turbo unit back. Any additional repairs to the Turbo9 will be taken from the Surcharge refund.

Return exchange turbo shipping should be recorded courier and is at your own expense and responsibility. If you wish to keep your original turbo you can do so and we will keep the deposit you have paid. If we do not receive your exchange unit back with in 30 days from delivery of your new K16/K24 unit you will lose the ability to claim back your £200 + VAT deposit.

Once we receive your exchange turbo unit back we will inspect it and refund your exchange deposit only if the unit is in full working order and is not damaged. Any damage will be deducted from the exchange refund, most common damage is broken bolts in the turbo casing, cracked casing / manifold, damaged impeller wheels etc.

Please allow 5 working days from order while we prepare your turbo and kit….

Read More


  • K16/K24
  • Billet heatshield
  • The compressor wheel is a K24 billet 61.98mm exducer, 49.62 inducer 7/7 blade.
    CNC re-profiled compressor cover
  • Ported compressor cover inlet
  • AET bespoke motorsport 6 pad thrust bearing assembly.
  • Total seal turbine piston ring seal for low back pressure exhaust systems
  • Modified Seal plate to match hi-flow compressor wheel
  • Cut back turbine exducer blades for better flow @ high RPM ranges
  • Forge T2 actuator with blue spring
  • Forge re circulating dump valve with yellow spring
  • Ported inlet manifold matched to manifold gasket
  • Enlarged and ported wastegate
  • Core assembly VSR balanced to motorsport specifications
  • Fully blue printed to motorsport specs.