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SLS 825 Supercharger System
Purchase SLS 825 Supercharger System
  • SKU: 01-159-00770-0

    SLS 825 Supercharger System

  • 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

    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.

  • $16,799.00

  • Prop 65 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

Weistec Horsepower 825
Weistec Torque 661
Manufacturer Weistec
Street legal in all the US States No
Engine Family M159
Stock Horsepower 563
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year make model trim engine
2015 Mercedes-Benz SLS AMG Black Series (W197) NA 6.2L V8 (M159)
2015 Mercedes-Benz SLS AMG GT (W197) NA 6.2L V8 (M159)
2015 Mercedes-Benz SLS AMG Base (W197) NA 6.2L V8 (M159)
2014 Mercedes-Benz SLS AMG Black Series (W197) NA 6.2L V8 (M159)
2014 Mercedes-Benz SLS AMG GT (W197) NA 6.2L V8 (M159)
2014 Mercedes-Benz SLS AMG Base (W197) NA 6.2L V8 (M159)
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SLS 825, 825 Horsepower, 661 ft-lb of Torque
For vehicles with Weistec Headers and Midpipes

The SLS 825 Supercharger System is the pinnacle of performance for the SLS. If you want to make your SLS as powerful as possible, the SLS 825 Supercharger System is the way to go. No other products on the market will make your SLS as fast and powerful.
The system features our 3.0L Twin-Screw Compressor to make an astonishing 214 more horsepower than a stock SLS while still running on California 91 Octane pump fuel.

This is the SLS 825, The world's most powerful SLS AMG...Period.


Weistec SLS 825

* Allow 5-6 weeks for orders to be shipped.  Supercharger systems are made to order.

SLS 825 Supercharger System

  • 3.0L Twin-Screw Compressor Module Why Twin-Screw?

  • Dual High Flow Cast Aluminum T6 Hardened Intake Tubes

  • Performance Spark Plugs

  • 1000hp Liquid to Air Intercooler Core

  • High Flow Cast Aluminum T6 Hardened Lower Manifold

  • High Flow Cast Aluminum T6 Hardened Throttle Body Inlet Y

  • 45mm Boost Bypass Assembly

  • 8-Rib Direct Drive Belt System

  • SFI Approved Light Weight 8-Rib Crank Damper

  • Crank Pin Drill Tool

  • Billet Aluminum Direct Drive Cradle System

  • Hard Anodized Billet Aluminum Serpentine Idlers

  • Johnson CM30 30 Liter/Min Intercooler Water Pump

  • Intercooler Water Recovery Tank

  • Cross Flow Heat Exchanger

  • High Flow Fuel Rail System

  • Upgraded Fuel Injectors

  • Power-Steering Reservoir Relocation Assembly

  • Weistec Engineering SLS 825 Supercharger System ECU Reflash

  • Weistec Engineering SLS TCU Upgrade

Note: This item is considered special order. (See Terms and Conditions)