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You are here: Home | Focus | Focus ST Mk4 2.3T

Focus ST Mk4 2.3T

Fully Track Tested at Blyton Park, Donington Park and Cadwell


A full range of power kits are available from 335bhp to 400bhp

Pumaspeed's aim is to simplify the whole tuning process by supplying no fuss bolt-on bolt-off quality parts and ECU mapping for the new Ford Focus ST Mk4 2.3. Whether you need a simple cat back exhaust to enhance the exhaust note or to push hard on track with a fully equiped 400bhp track ready weapon our no nonsense approach to tuning kits has worked well for many years. Its worked so well in fact that since 2015 we have sold over 1300 340bhp hybrid turbo power kits for the Ford Fiesta ST180.

2019 saw the launch of the new Mk4 version of the Ford Focus ST in both 2.3T EcoBoost petrol and 2.0T EcoBlue diesel models. 
Following on from our incredible success with the previous generations of Focus, we purchased 2 ST Mk4s as demonstrator vehicles, one petrol, one diesel. Both of these cars have seen software and hardware development, alongside on-road and intense on track testing at the likes of Donington, Cadwell and Blyton Park.


The new Ford Focus ST Mk4 has a few limiting factors that stop the car showing large amounts of power whilst being run on the dyno:

1. Dyno Mode - Deep inside the ECU is a setting you cannot access via any push button sequences, its strictly a full re-program mode only. To fully record any meaningful data this dyno mode has to be initiated by programming the ECU and again uninstalling after by reprogramming so simply running the car on a dyno will never show correct data.

2. Intercooler - The stock intercooler has a big job to do and is only just suitable for a 330bhp (500nm) Stage 1 map. We swap the intercooler out when installing the higher torque and higher powered Stage 1R map which develops 335-340bhp and as much as 560nm!

3. ECU - The stock ECU is very complex. Most tuners choose to run the ECU in a permanent diagnostic type mode that does not allow map switching in different modes to run varied power levels. Pumaspeed's MAXD software is currently the only software that will allow you to run more power and torque in sport/track modes thanks to our Push2Pass map switching. The MAXD ECU calibration has been programmed properly, not just hacked around to get more power.

4. Turbocharger - The stock unmodified turbo unit will not flow anymore than 365-370bhp, even with with all the bolt-on parts such as downpipes, exhausts, air filter and cross-over pipework. Uprated hybrid turbo units are now available from Pumaspeed with a theoretical flow rate of over 410bhp with the correct bolt on parts and MAXD remap calibration.


Stock Power - 282bhp / 421nm
Stage 1 Power Kit - Up to 330bhp / 510nm - Panel Filter with MAXD 99 Ron Stage 1 Calibration
Stage 1R Power Kit - Up to 340bhp / 560nm - Panel Filter, Intercooler and MAXD 99 Ron Stage 1R Calibration

Future Power Kits
Stage 2R Power Kit - Up to 365bhp / 570nm *Estimated - Cold Air Intake, Intercooler, Downpipe and MAXD 99 Ron Stage 2R Calibration
Stage 3R Power Kit - Up to 400bhp / 600nm *Estimated - Hybrid Turbo, Cold Air Intake, Intercooler, Downpipe and MAXD 99 Ron Stage 3R Calibration

Sort Order:
MAXD Flash Programmers
Pumaspeed MAXD FacemaskAdd to basket.

£9.90 (inc. VAT)

Pumaspeed MAXD Facemask

Clutches - Uprated
Cooling - Air
Diagnostic Tools
Forscan Diagnostic ELM327 CableAdd to basket.

£19.90 (inc. VAT)

Forscan Diagnostic ELM327 Cable

Exhausts - Pumaspeed Exclusive
Exhausts - Milltek
Exhausts - Scorpion
Scorpion Focus ST Mk4 GPF DeleteAdd to basket.

£114.90 (inc. VAT)

Scorpion Focus ST Mk4 GPF Delete

Exhausts - Cobra
Cobra Focus ST Mk4 DownpipeAdd to basket.

£314.90 (inc. VAT)

Cobra Focus ST Mk4 Downpipe

Cobra Focus ST Mk4 GPF DeleteAdd to basket.

£124.90 (inc. VAT)

Cobra Focus ST Mk4 GPF Delete

Exhausts - Accessories
Filters - Induction Kits
Forge Induction Kit Focus ST Mk4Add to basket.

£299.90 (inc. VAT)

Forge Induction Kit Focus ST Mk4

Filters - Panel
Service - Mail Order
Service - Workshop Fitted
Styling - Exterior
Focus ST Mk4 Front Lower GrilleAdd to basket.

£111.05 (inc. VAT)

Focus ST Mk4 Front Lower Grille

Focus ST Mk4 Front Upper GrilleAdd to basket.

£139.99 (inc. VAT)

Focus ST Mk4 Front Upper Grille

Suspension - Coilovers
Suspension - Lowering Springs
Suspension - Wheel Spacers
MAXD Domed BadgeAdd to basket.

£2.90 (inc. VAT)

MAXD Domed Badge

Pumaspeed Domed BadgeAdd to basket.

£2.90 (inc. VAT)

Pumaspeed Domed Badge

Pumaspeed Large Sticker (55cm)Add to basket.

£9.90 (inc. VAT)

Pumaspeed Large Sticker (55cm)

Pumaspeed SunstripAdd to basket.

£29.90 (inc. VAT)

Pumaspeed Sunstrip