The mountune m285 power upgrade for the Mk8/MK8.5 Fiesta ST - Puma ST takes performance and fun to a new, elevated level, releasing up to 285PS and 385Nm from the ST's 1.5-litre 3-cylinder EcoBoost engine - and all whilst still retaining the factory GPF and catalyst.

The m285 is based around a new hybrid turbocharger which starts life as a new genuine Ford turbo, before having numerous upgrades carried out to it, such as; a bespoke compressor and turbine wheel, uprated bearings and a ported compressor housing shroud (to help prevent surge).

The end result is response and low-end performance that feels like the OE turbo, combined with mid-range and top-end power and torque that feels anything but like the standard turbo.

The additional torque output is delivered across a wide spread in the rev-range which translates into effortless drivability and totally transforms the overall driving experience and fun-factor.

As this is a hybrid unit based on the OE Ford turbo, installation is direct swap like-for-like and on a similar basis installation of the supporting m285 calibration is applied using our SMARTflash app, OBD Bluetooth adaptor and your smartphone, so it couldn't be simpler - no dealer visits, no laptop, no wires, no handsets, no hassle!

The latest version of SMARTflash also provides additional functionality, such as fully configurable gauge displays using the OBD data-stream, comprehensive data-logging and a built-in performance meter, too.

m285 SMARTflash is also supplied with two specific performance calibrations, a hybrid economy calibration - which has a reduced power output but allows you to safely use 95RON, plus two companion calibrations (standard and anti-theft) which include the following features:

m285 performance calibration

	Increased power and torque (up to 285PS / 385Nm)
	More aggressive launch control strategy
	Enhanced audible exhaust output in Sport / Track modes
	Optimised no-lift shift functionality

m285 performance ASMO calibration

	Increased power and torque (up to 285PS / 385Nm)
	More aggressive launch control strategy
	Anti Social Mountune Overrun Enhanced audible exhaust output in Sport / Track modes (for those who really like their pops and bangs)

Hybrid Economy calibration (95RON compatible)
Standard power calibration
Anti-theft

For assistance setting up and installing SMARTflash, please refer to the user guide, here.

Important: In order to achieve and maintain performance and reliability, the m285 upgrade should be used in conjunction with the hardware listed below and should only be used with 97RON+ fuel. If a lower octane rating of fuel is the only grade available we recommend switching to the supplied Hybrid Economy calibration which can be used on normal unleaded fuel reliably in all scenarios.

Recommended m285 hardware:

Carbon induction kit
Charge pipe upgrade
Uprated intercooler
Forged pistons and rods

Two versions of the m285 upgrade are available; one for owners upgrading from m235 or m260 that already have the recommended hardware installed and that have a SMARTflash OBD Bluetooth adaptor already for their vehicle and who just require the turbo and calibration. The other is for customers that have not yet upgraded to SMARTflash and require the OBD adaptor, calibration and turbo.

The phone device is shown for illustration of SMARTflash app only, and is not included with this product.

HQ fitting time: 7 Hrs

Please note: the price shown for this product includes installation at mountune HQ only, and is not transferrable to any other dealer or installer.

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you to confirm this date. If we can't accommodate your preferred choice, the team will discuss other available dates.

Mk8 Fiesta ST (Facelift 2022>)

m285 Turbocharger Upgrade [Mk8/MK8.5 Fiesta ST | Puma ST]

Forged Connecting Rod Set [Mk8 Fiesta ST | Puma ST]

Forged Piston Set [Mk8 Fiesta ST | Puma ST]

High Flow Rear Intake Heat Jacket [Mk8 Fiesta ST | Puma ST]

Quaife ATB Differential [Mk8/MK8.5 Fiesta ST / Puma ST]