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Injector Dynamics ID1050X injectors supplied in the M-Engineering Stage 2+ package for the McLaren 720S

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M-Tuner v3 wireless dongle included in the McLaren M840T Stage 2+ Power Package for OBD flashing

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M-Engineering M840T Stage 2+ Power Package for McLaren 720S 2018-2023

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Regular price: $9,176.47
Regular price: ~~$9,659.44~~
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M-Engineering M840T Stage 2+ Power Package for McLaren 720S 2018-2023

Subtotal: $9,176.47

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Vendor: M-Engineering

SKU: M840T-S2+-PP

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Overview

The M-Engineering Stage 2+ Power Package is the flex-fuel step for stock-turbo M840T cars: the 720S, 765LT, Senna and GT. It bundles the M-Tuner Calibration Suite and the M840T Motorsport Tuning Package with Injector Dynamics ID1050x injectors and a plug-and-play injector harness built for M-Engineering.

The larger injectors let the car run E85, which M-Engineering says gives the same performance benefits as race fuel. Live map switching lets you move between a pump gas map and an E85 map, so you can fill up with whatever is available.

Key specs

Install method	One-time bench unlock: remove the ECU and mail it to M-Engineering HQ. After it is returned and reinstalled, every flash is done at home over OBD-II with the wireless M-Tuner v3 dongle. The injectors and harness are a hardware install.
Published power	No numeric gain is quoted. M-Engineering's calibration notes publish dyno plots measured at the wheels
Fuel	Pump gas and E85, switchable live
Required hardware	Aftermarket downpipes, 3 in or larger (not included). ID1050X injectors (included)
Computer	Windows 10 or Windows 11 PC
Fits	McLaren 720S, 765LT, Senna and GT with stock turbos (M840T)

Features

Live map switching between pump gas and E85
M840T Motorsport Tuning Package: rolling anti-lag, closed-loop boost control, injector characterization, staged injection and fan override
M-Tuner software: datalogging, live data, fault clearing, dyno mode, Auto Start/Stop disable, left-foot braking, kickdown disable and loud start

What is included

M-Tuner Calibration Suite with the M-Tuner v3 wireless OBD dongle
M-Tuner Motorsport Tuning Package
Injector Dynamics ID1050x injectors
M-Engineering injector harness, 100% plug and play with the OEM main engine harness

Required and recommended parts

Aftermarket downpipes of 3 in or larger, which the Stage 2+ calibration expects (not included).
Cars with upgraded turbos should look at the Stage 3 Power Package instead; this kit is for stock turbos.

Frequently asked questions

Is this a bench flash or an OBD flash?
It starts on the bench and then moves to OBD. The M840T ECU is removed once and mailed to M-Engineering HQ for a one-time unlock. Once it is back in the car, you load maps, switch stages and update calibrations yourself through the OBD-II port with the wireless M-Tuner v3 dongle and a Windows 10 or 11 PC.

How much power does Stage 2+ make?
M-Engineering has not published a single headline figure for this package. It states that E85 gives the same performance benefits as race fuel, and its calibration notes show dyno plots measured at the wheels.

Do I need to change my fuel system?
The package supplies the ID1050x injectors and the harness that the Stage 2+ calibration is written for. Downpipes are the other required part and are sold separately.

Fitment notes

Stage 2+ is written for stock-turbo M840T cars. Choose the Stage 3 package if your car has, or will get, upgraded turbochargers.

Year	Make	Model	Chassis	Engine
2018-2023	McLaren	720S	MonoCage II	4.0L Twin-Turbo V8 (M840T)
2021-2022	McLaren	765LT	MonoCage II	4.0L Twin-Turbo V8 (M840T)
2019	McLaren	Senna	MonoCage III	4.0L Twin-Turbo V8 (M840TR)
2020-2023	McLaren	GT	MonoCell II-T	4.0L Twin-Turbo V8 (M840TE)

Fitment

Year	Make	Model

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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