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SLR Biturbo System
Purchase SLR Biturbo System
  • SKU: 01-155-01030-6

    SLR Biturbo 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 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.

  • $49,999.00 $49,999.00

  • 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 1073
Weistec Torque 953
Turbo Type W.4 (Complete Replacement)
Manufacturer Weistec
Street legal in all the US States No
Stock Horsepower 617
See more
year make model trim engine
2013 Mercedes-Benz SLR McLaren Edition (C199) Supercharged 5.5L V8 (M155)
2012 Mercedes-Benz SLR McLaren Edition (C199) Supercharged 5.5L V8 (M155)
2011 Mercedes-Benz SLR McLaren Edition (C199) Supercharged 5.5L V8 (M155)
2010 Mercedes-Benz SLR McLaren Edition (C199) Supercharged 5.5L V8 (M155)
2010 Mercedes-Benz SLR Base (C199) Supercharged 5.5L V8 (M155)
2009 Mercedes-Benz SLR Stirling Moss (C199) Supercharged 5.5L V8 (M155)
See more

Product Description

Contact for an time estimate for shipping.


Weistec SLR BiTurbo System

The SLR is one of the most unique and exclusive vehicles Mercedes has produced in recent times. Through meticulous engineering and testing, Weistec Engineering, the leader in Mercedes aftermarket performance, has created a system that cannot be matched. We at Weistec understood and respected the rich history of the SLR and only sought out to enhance the supercars driving experience.

Our top engineers have spent a substantial number of hours designing and developing the most powerful SLR system on the planet. The goal was simple; a complete system providing consistent and usable power without sacrifice. The factory supercharger system is replaced with a massive water to air intercooler, which works in conjunction with the factory SLR intercoolers, to provide maximum cooling and ensure consistency in power. Only the highest quality materials and over 800 individual components were used to create the Weistec SLR BiTurbo System, including Inconel Steel, Stainless Steel, and Aircraft Grade Aluminum. To ensure longevity and the highest performance possible, Ball Bearing Turbochargers with Billet Compressor Wheels are standard.

Watch the film to see the creation of our inspiration and design come to life with the unbelievable power gains given by Weistec.

Key Features

  • 730+ Wheel Horsepower (860 BHP) on 91 Octane Fuel
  • 900+ Wheel Horsepower (1050 BHP) on MS109 Fuel with Supporting Upgrades
  • Twin Ball Bearing Turbochargers
  • CNC Billet Compressor Wheels
  • Dual External Wastegates
  • Dual Weistec Anti Surge Valves
  • Aircraft Grade Aluminum Components
  • Weistec Water to Air Intercooler Replaces Factory Supercharger
  • 82mm Throttle Body
  • Cast Inconel Steel Turbo Manifolds
  • Stainless Steel Downpipes
  • Stainless Steel Hardware
  • Retains Factory SLR Airbox
  • Electronically Controlled Boost

 *Product may not be emissions compliant.  Check local laws prior to installation.