My Cart: 0 item(s)
ENGINEERING THE FUTURE OF PERFORMANCE ™
follow us:
0
1-877-WEISTEC Sales@Weistec.com
My Account Checkout
Log In
0
0
Product Search

Secure Checkout
Porsche EA825 ECU Tune
    Porsche EA825 ECU Tune
    Purchase Porsche EA825 ECU Tune
    • SKU: 05-825-00382-3

      Porsche EA825 ECU Tune

    • Power gain Up To

      +99 HP

      Torque gain Up To

      +150 TQ

      Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the following: Learn More about Crank HP Vs Wheel HP

      Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series.  Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp.  Naturally the C63 will show more gains as it starts at a lower level.

      Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power.  The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

      Fuel – Fuel quality is HIGHLY important with performance vehicles.  Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

      Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive.  This results in lower numbers when testing on a chassis dyno.  Wheel/tire size and weight will also impact chassis dyno results

      Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

      Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

      Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.
    • Stage:
    • Choose from Recommended Products (Optional):

    • $2,499.00 $2,499.00 $2,124.15 $2,124.15

      2026 Labor Day Sale 15% off: $374.85

    • How To Tune
    • Prop 65 warning
      Warning

      This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
    Weistec Horsepower 567
    Weistec Torque 592
    Manufacturer Weistec
    Street legal in all the US States No
    Stock Horsepower 468
    Stock Torque 442
    See more
    year make model trim engine
    2025 Porsche Cayenne S (PO536-FL) Twin Turbo 4.0L V8 (EA825)

    Product Description


    Weistec specializes in engineered performance solutions with designs that match and often exceed OEM levels of precision and quality. Our ECU Tune for Porsche's 4.0L Twin Turbo V8 (EA825) is designed to enhance the vehicle's characteristics without compromising the drivability or reliability of the vehicle. What does all this mean to you? More power, sharper throttle response, and a complete focus on the driver makes this the perfect addition to your 2025 Porsche Cayenne S for a much more enjoyable experience. For more information please feel free to contact our performance specialists via phone or email at sales@weistec.com.

    IMPORTANT NOTE: This ECU is locked by the manufacturer and requires an ECU Unlock before tuning. This tune requires a bench flash and is available by mailing in your vehicle's ECU to us or through a Cypher Pro Dealer -- it is not available as a self-install (no Cypher Plus / Cypher Classic option). If you have any questions please visit our Support Page to reach out to our performance specialists.



    Key Features

    • Optimized Fueling

    • Increased Torque Limits

    • Optimized Ignition Timing

    • Removed Speed Limiter

    • Increased Boost

    Related Items

    Porsche PDK TCU Tune
    Porsche PDK TCU Tune
    $1,199.00
    $1,019.15
    Add To Cart

    How Do You Get Your Porsche EA825 ECU Tune Installed?

    These are the confirmed methods for this specific application, not a general list. This reflects exactly what your module supports.

    1

    Cypher Plus

    Order a Cypher Plus and tune your car yourself from your phone, entirely through the MyFlasher app. Available on most supported vehicles. Watch how it works.

    2

    In Person

    Bring your vehicle, or just your ECU/TCU, to our Anaheim, CA headquarters. Call 714-202-0005 or email sales@weistec.com to schedule.

    3

    Cypher Pro Dealer

    Visit a certified Cypher Pro Dealer near you. Find one with our dealer locator.

    4

    Mail It In

    Remove your ECU or TCU and mail it to us for tuning. Required for some applications; see notes above.

    See the full tuning process →

    Understanding CPC & TCU Tunes

    What is a CPC module?

    The CPC (Central Powertrain Control) is a separate control unit that manages things like the active exhaust valves, radiator fan, intercooler pumps, and speed limiter. On many newer Mercedes-Benz vehicles, it also houses torque limiters that can hold back an ECU tune from reaching its full potential.

    Read the full CPC & TCU breakdown →

    What is a TCU tune?

    A TCU (transmission control unit) tune delivers faster, firmer shifts with higher line pressure, reducing clutch slip and increasing the transmission's torque capacity. It's a worthwhile upgrade on its own, or paired with an ECU tune for a fully sorted powertrain.

    Read the full CPC & TCU breakdown →

    What is an ECU Unlock?

    Modern ECUs are often locked down, especially after a dealer software update, which can block bench flashing or OBD flashing. Our ECU Unlock Service removes those restrictions, is done per ECU, and stays active through most future dealer updates as long as the bootloader isn't overwritten.

    Read the full ECU Unlock breakdown →

    Good to Know

    • This is a reflash of your original module, not a stand-alone unit.
    • Power gains vary by vehicle, modifications, fuel, and operating conditions (ambient temperature, altitude, etc.).
    • Product may not be emissions compliant. Check local laws prior to installation.
    • Always use a battery charger during programming.
    • Newer vehicles may require an ECU Unlock before tuning is possible.