Thanks for contacting us! We'll get back to you as soon as possible

Dyno chart of a Porsche 991.2 GT3 with the M-Engineering Stage 1 calibration against the stock car

}

Stock vs Stage 2 wheel horsepower and torque for the 991.2 GT3 with the M-Engineering ECU tune

}

M-Engineering Stage 1 dyno comparison for the Porsche 991.2 GT3 RS

}

Porsche 991.2 GT3 RS dyno sheet: stock output versus the M-Engineering Stage 2 calibration

}

Dyno results for the 991.2 GT3 Touring on the M-Engineering Stage 1 ECU calibration

}

Stage 2 M-Engineering calibration dyno chart for the Porsche 991.2 GT3 Touring versus stock

}

M-Engineering ECU Tune for Porsche 991.2 GT3 / GT3 RS 2018-2019

Name: M-Engineering ECU Tune for Porsche 991.2 GT3 / GT3 RS 2018-2019
Brand: M-Engineering
SKU: ME-CAL-Porsche-991.2-GT3-ECU
Price: 3000.0 USD
Availability: InStock

Ask an expert

Vendor: M-Engineering

SKU: ME-CAL-Porsche-991.2-GT3-ECU

Regular price: $3,000.00
Regular price
Sale price: $3,000.00
Unit price: per

Apply at checkout

Not sure it fits? Text us your VINSee all fitment

Subtotal: $3,000.00

Quantity:

M-Engineering ECU Tune for Porsche 991.2 GT3 / GT3 RS 2018-2019

Subtotal: $3,000.00

Questions before you buy? Talk to a specialist.

Fitment and product questions · 9am–6pm Pacific

Call(310) 231-0292 Text(310) 886-3111 ChatLive chat

Price match: found it cheaper?
Secure checkout · Shop Pay · Affirm
AutoTalent since 2006

Free Shipping

Free standard shipping on orders over $99

Coupon Code on First Order

Price Match Guarantee

Free shipping on $99+ order

30-days Returns

Overview

M-Engineering's ECU calibration for the 991.2 GT3 / GT3 Touring / GT3 RS is a bench flash: the ECU comes out of the car, ships to M-Engineering HQ and is returned with the new software, typically within about 24 hours of arrival. The calibration sharpens throttle response, removes the top speed limiter and revises air/fuel ratios and ignition timing.

The calibration covers the 4.0-liter GT3, GT3 Touring and GT3 RS. Pick Stage 1 if the car keeps its stock headers, or Stage 2 once aftermarket headers are fitted; both stages are offered for 91, 93 and 100 octane and E85. Live Map Switching from the cruise stalk lets you keep several of those maps loaded, along with a stock-power map and a valet map.

Key specs

Install method	Bench flash. Remove the ECU and send it to M-Engineering HQ; typical turnaround is about 24 hours
Published power	Dyno charts measured at the wheels on a DynoJet 424 Linx are published in M-Engineering's calibration notes. No numeric claim is made in the product text
Maps	Stage 1 and Stage 2 calibrations in 91, 93 and 100 octane and E85
Stage 1 hardware	Stock headers. Stock or aftermarket exhaust
Stage 2 hardware	Aftermarket headers required
Live Map Switching	Switch maps from the cruise control stalk. Example 5-slot layout: stock power, 93, 100, E85 and valet. Custom slot layouts on request

Features

Sharper throttle response
Top speed limiter removed
Revised air/fuel ratios and ignition timing
Live Map Switching from the cruise stalk
Left-foot braking, a feature track drivers use when braking with the left foot

What is included

M-Engineering ECU calibration for the 991.2 GT3 / GT3 RS, flashed to your ECU on the bench (M-FLASH) after you send the ECU to M-Engineering HQ
Typical turnaround of about 24 hours after M-Engineering receives the ECU, then the flashed ECU is returned to you

M-Engineering does not publish a separate contents list for this bench service.

Required and recommended parts

Stage 1: stock headers with a stock or aftermarket exhaust.
Stage 2: aftermarket headers are required.
PDK tuning for this car is a separate M-Engineering product and requires this ECU calibration.

Frequently asked questions

Is this a bench flash or an OBD flash?
Bench. The 991.2 ECU is removed and sent to M-Engineering HQ, flashed there, and shipped back, usually about 24 hours after it arrives. There is no at-home OBD flashing for this calibration.

How much power does it add?
M-Engineering publishes wheel-horsepower dyno charts for each stage in its calibration notes, measured on a DynoJet 424 Linx, rather than a single headline figure. Your result depends on the stage, the fuel and the hardware fitted.

Which fuels are supported?
Stage 1 and Stage 2 maps are available for 91, 93 and 100 octane and for E85, and Live Map Switching lets you carry several of them at once.

Fitment notes

This calibration is for the naturally aspirated 991.2 GT3 / GT3 Touring / GT3 RS. US model years are shown below.

Year	Make	Model	Chassis	Engine
2018-2019	Porsche	911 GT3	991.2	4.0L Flat-6
2018-2019	Porsche	911 GT3 Touring	991.2	4.0L Flat-6
2019	Porsche	911 GT3 RS	991.2	4.0L Flat-6

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.

Reviews & questions