Bentley Flying Spur W12 Mulliner / Speed ECU tune

Fits 2021–2024 · Stage 1 and Stage 2 · Mail-in

$4,999

Front three-quarter view of a dark green Bentley Flying Spur W12 Mulliner parked among fallen leaves

Stage 1

740hp

710lb-ft

From 626 hp / 664 lb-ft stock

Stage
Horsepower+114 hp
626 hp factory740 hp tuned
Torque+46 lb-ft
664 lb-ft factory710 lb-ft tuned

Tuned figures are estimates; results vary.

  • You ship: your ECU, with your printed order confirmation
  • Turnaround: two business days from when your ECU arrives
  • Return shipping: paid by us

The car

About the Bentley Flying Spur W12 Mulliner / Speed

These are the twelve-cylinder Flying Spurs from the last years of the W12. The Mulliner, revealed at Monterey Car Week in August 2021, is the most luxurious version of the sedan, and the Speed, launched in September 2022, is the most driving-focused. Once the standard Flying Spur W12 left production in May 2022, these two were the only W12 sedans Bentley offered, until the final W12 engine was built in Crewe in 2024.

Both use the 6.0-liter twin-turbo W12 with an eight-speed ZF dual-clutch gearbox and a clutched all-wheel-drive system that drives the rear wheels and adds the front axle as needed. On the Speed, electronic all-wheel steering, Bentley Dynamic Ride and torque vectoring by brake are standard. This generation’s wheelbase is 130 mm longer than the previous Flying Spur’s, and its Flying B hood mascot deploys electrically and is illuminated.

Stage 1 is calibrated for the car as it left the factory and takes it from 626 hp and 664 lb-ft to 740 hp and 710 lb-ft on pump-grade fuel. Stage 2 is calibrated for supporting bolt-on modifications and high-octane fuel, for 760 hp and 790 lb-ft.

More about Bentley tuning

Figures & prices

Bentley Flying Spur W12 Mulliner / Speed tune figures by year

Factory and tuned horsepower and torque from our catalog, with prices for each stage and add-on.

Model yearFactoryStage 1Stage 2Add-ons
2021–2024626 hp / 664 lb-ft740 hp / 710 lb-ft
$4,999
760 hp / 790 lb-ft
$4,999
—

Tuned figures are estimates, not guarantees. Actual results vary with the car’s condition and modifications, fuel quality and octane, temperature, altitude and the dyno used. See our Terms of Service.

How it works

Mail-in tuning, start to finish

  1. 01

    Order online

    Choose your year, stage and add-ons and check out securely.

  2. 02

    Ship your ECU

    Pack it with your printed order confirmation email and send it to our Phoenix shop.

  3. 03

    We calibrate it

    Within two business days of it arriving.

  4. 04

    We ship it back

    Return shipping is on us. Reinstall and drive.

How mail-in tuning worksECU shipping instructions

FAQ

Flying Spur W12 Mulliner / Speed tuning questions

More answers in our FAQ

Which years of the Flying Spur W12 Mulliner / Speed does this tune fit?

Our online catalog lists Stage 1 and Stage 2 tunes for 2021–2024 Bentley Flying Spur W12 Mulliner / Speed models. Choose your year at the top of the page; the figures and prices are the same for every year.

How do I tell a Flying Spur Mulliner from a Flying Spur Speed?

The Mulliner has a Double Diamond grille, Satin Silver mirror caps, Mulliner wing vents and 22-inch wheels with self-leveling center caps, with Diamond-in-Diamond quilted seats inside. The Speed has dark-tinted grilles, headlamps and tail lamps, Speed badges low on the front fenders and its own 22-inch wheels.

Is the V8 Flying Spur Mulliner covered here?

No. The Mulliner was also sold with the 4.0-liter V8 and with a V6 hybrid, but this page covers its W12 version only. The V8 Flying Spur, S and Azure are on the Flying Spur V8 / V8 S / Azure page.

What is the difference between Stage 1 and Stage 2 on the Flying Spur W12 Mulliner / Speed?

Stage 1 is calibrated for the car as it left the factory and runs on pump-grade fuel. Stage 2 pairs the calibration with supporting bolt-on modifications such as downpipes and runs on high-octane fuel. On a 2024 car, Stage 1 takes it from 626 hp to 740 hp. Stage 2 takes it to 760 hp.

More Bentley tunes

Other Bentley models we tune

All Bentley tuning

Contact

Talk to our tuning shop

Customers across the US order online and mail us their ECU. Our shop is at 952 W Melinda Ln, Suite D in north Phoenix (Deer Valley, 85027), and local owners are welcome to bring their car in. Call, visit or send us an inquiry.

HOURS Mon - Fri: 8AM - 5PM
Sat & Sun: Closed

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