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Price Container

HORSEPOWER

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+71HP
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S4T TUNED

425 HP

FACTORY

354 HP

TORQUE

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+71TQ
t

S4T TUNED

440 TQ

FACTORY

369 TQ

730

S4T TUNED

HP

592 HP FACTORY +

138

650

S4T TUNED

TQ

547 TQ FACTORY +

193

How Remote Tuning Works (OBD)

Step 1

After you check out, you will receive a form via email (FILL OUT THE FORM). Tuning tools will be shipped

Step 2

Ensure access to a windows 7+ laptop & Wi-fi & Mobile Hotspot Recommended for Data logging

Step 3

Tuning & Data logging will be performed via OBD port (We walk you through it).

Step 4

Have Fun

How Remote Tuning Works (Bench)

Step 1

After you check out, you will receive a form via email (FILL OUT THE FORM).

Step 2

ECU removal & shipping instructions provided via email

Step 3

Ensure access to a windows 7+ laptop & Wi-fi - Mobile Hotspot Recommended for Data logging

Step 4

Ship us your ECU(s). We tune it. We ship it back (Data logging cable included).

Step 5

Reinstall your ECU(s). Data log (We walk you through it)... Have fun

How Remote Tuning Works (FEMTO)

Step 1

After you check out, you will receive a form via email (FILL OUT THE FORM).

Step 2

ECU Removal & shipping instructions provided via email

Step 3

FEMTO unlocks typically take 10-14 business days

Step 4

Deactivate over-the-air updates. These settings are found in 2 places. On the I-Drive and on your BMW app. Both must be deactivated. Deactivation instructions are available from us.

Step 5

Reinstall your ECU(s). Data log with the provided cable (We walk you through it).

Step 6

Have Fun.

How Remote Tuning Works (Special)

Step 1

After you check out, you will receive a form via email (FILL OUT THE FORM).

Step 2

ECU removal & shipping instructions provided via email

Step 3

Wait… these unlocks take time. 2-4 weeks typically*

Step 4

Yay.. It's back.

Step 5

Reinstall your ECU(s). Data log with provided cable (We walk you through it).

Step 6

Have Fun.

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OPTIONS / FEATURES:

Extend Or Add Burble
Multiple Custom Maps That You Can Alternate Between
Adjust the tune for your octane rating
Top speed limiter removal
Calibrate the tune for every additional upgrade on the vehicle
Check engine light removal for downpipes (Stage 2 & For off-road use only)
Cold start delete - On/Off

ON THE FLY MAP SWITCHING

• 4 Map slots available

• Map numbers is indicated by tachometer position (ex. 1000rpm = Map 1, 2000rpm = Map , and so on)

• No laptop required for switching... All Configurations are saved in the ECU and switchable as the driver wishes

What is ECU Tuning?

A few decades ago, some nerds figured out that computers allowed for incredibly precise control of internal combustion engines… thus the ECU was born.

The Engine Control Module, often shortened to ECU, ECM or DME, is the electronic brain of all modern cars. Unfortunately, car makers must consider things other than performance when designing ECU software… leaving much to be desired.

Enter S4T… focused solely on providing properly developed ECU calibration software giving you the highest performing and best driving car possible.

Transmission (TCU) Tune

• Transmission Control Unit - TCU tuning allows us to further refine the shifting speed, ferocity, and charastics of various automatic, semi automatic, and dual-clutch gearboxes.
• Improved acceleration times (¼ mile, 60-130 mph, 100-150mph, etc.)
• Torque limiter adjustment
• Custom torque management
•Paddle-to-shift delay time improved
•Increased internal control pressures to support greater torque demands and prevent slip
•Launch Control Enhancement

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Central Powertrain Controller (CPC) Tune

• The CPC is a separate module within the power-train control system
• All Mercedes cars equipped with a 9-speed MCT require CPC Tuning to unlock the eCU’s Full Potential
Here’s why:
    • Top speed limiter
    • Park neutral limiter
    • Inter-cooler pump control
    • Exhaust flap regulation
    • Etorque limitation strategies

CPC Process:
    • New Virgin CPC Module Shipped Upon Purchase
    • New CPC must physically be installed
    • CPC Tuning is conducted via OBD port

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Cars We Tuned

Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Cars We Tuned

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Performance

Boost engine horsepower and torque

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Sound

Increase engine airflow & improve noise

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Reliability

Reduce unnecessary stress on components

Data Logging

•Real-Time Data Monitoring:


Continuously track your vehicle's performance to make precise adjustments.

•Real-world Conditions:

We ensure the car behaves as wanted in real-world or dyno conditions

Note: 
● All tunes are for off-road use / motorsport application only
● All tunes void factory warranty
● Horsepower numbers are dependent on fuel, density altitude, and vehicle modifications
● All quoted horsepower & torque figures are at the flywheel. Real horsepower numbers are subject to platform specific drivetrain loss.

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ECU UNLOCK

"OBD"

OBD communication is awesome, tune and datalog your car easily from the drivers seat via the diagnostic port (OBD2) found under the dashboard. Tuning cable is shipped and instructions provided with purchase.

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ECU UNLOCK

"BENCH FLASHING"

Some cars require the ECU to be removed and shipped to us for tuning to be performed. Removal and shipping instructions will be provided with purchase.

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ECU UNLOCK

"FEMTO UNLOCK"

BMW's produced after 06.2020 require the ECU to be sent to us, and subsequently to our associates in Europe for unlocking. After this, OBD tuning and data logging is possible. This process typically takes 10-14 business days. ECU removal and shipping instructions will be provided along with an OBD device post purchase.

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ECU UNLOCK

"S4T SPECIAL UNLOCK"

Some of the newest cars, for example 992 GT3 RS, are equipped with enhanced ECU security measures. Tuning these cars requires the ECU to be sent to us and forwarded to our partners in Europe. These unlocks are highly specialized and can take 4 weeks or more to complete. Special instructions will be given with purchase.

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What separates Stage 4 Tuning?

We offer custom tuning solutions with over 30 years of experience, backed by our in-house engineers. We specialize in tailored tuning options - nothing is off-the-shelf.

Any fuel, Anytime, Anywhere.

When you join our family, you’re not just a customer—you’re with us for the long haul. 

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Email Support

Email Support

Have A Question? Our Dedicated Team Is Ready To Help! Send Us An Email At

Info@Stage4tuning.com
Live Chat

Live Chat

For Real-Time Help, Use Our Live Chat Feature Available On Our Website. Click The Chat Icon.

Phone Support

Phone Support

Prefer Speaking Directly To Someone? Give Us A Call At

901 351 5258