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Green Brook Auto Repair

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SL55 AMG Weistec M113K Supercharger Upgrade

SL55 AMG Weistec M113K Supercharger Upgrade | Image 1

Redline Speed Worx (RSW), New Jersey's Mercedes Benz Repair & AMG Specialist recently had the opportunity to complete a full upgrade of the R230 Chassis SL55 AMG factory Supercharger Unit to Weistec Engineering's M113k Supercharger System.

Interested in this upgrade for your Mercedes Benz 55 AMG M113K? Contact Our Service Team Today!

Mercedes SL55 AMG Weistec Supercharged | Image 2

2002 was a milestone for Mercedes and European sports car enthusiasts. The AMG SL55 equiped with the M113K could only be described as a game changer. When AMG transformed the production Mercedes 5.5L V8 into a Kompressed monster, there were not many cars left in the world that could overtake it. The factory forced induction engine lead to an entire industry of Mercedes aftermarket, an industry that has squeezed every last drop of power from the stock Kompressor.


It has been 10 years from its original release but it is time for todays game changer. Weistec is proud to produce the M113K 3.0L Twin Screw Supercharger System. We have taken our proven supercharger design concepts and applied them to create the most efficient, reliable, and powerful upgrade ever available.

RSW Installed Weistec Supercharger System on SL55 AMG NJ | Image 3

Using our 3.0L Twin Screw, we have set the record for the Worlds Fastest Mercedes with our Stage 3 M156 Supercharger System. Producing engine power levels exceeding 1000 Horsepower.

Weistec Supercharger Upgrade | Image 4


  • 3.0L Twin-Screw Compressor Module Why Twin-Screw?
  • 1000hp Liquid to Air Intercooler Core
  • High Flow, Cast Aluminum, T6 Hardened Lower Manifold
  • High Flow, Cast Aluminum, T6 Hardened Intake Elbow and Throttle Body Inlet
  • Maintains Factory Electronic Bypass Valve
  • Hard Anodized Front Drive Bracket with Double Bearing, Belt Wrap Idler
  • HD 8 Rib Belt Tensioner
  • HD Supercharger Serpentine Drive Belt
  • High Flow Billet Fuel Rail System
  • 650cc Fuel Injectors
  • Molded Silicone Air Pump and Throttle Body Coupler
  • Weistec Weaved Cotton Fiber Air Filter
  • New OEM Gaskets

82mm Throttle Body, Mercedes OEM

The Mercedes OEM 82mm throttle body is a bolt on option for the Weistec 3.0L supercharger resulting in increased horsepower and torque. (20+ hp on an otherwise stock car and 50+hp on a modified car).

Mercedes 82MM Throttle Body Upgrade | Image 5

The 82mm throttle body is a must for those looking to get as much power as possible.


  • Mercedes OEM 82mm Throttle Body
  • Increased Airflow over 74mm Throttle Body

Trunk Ice Tank: Supercharger Cooling

Weistec Engineering is proud to introduce the trunk mounted water tank upgrade for all M156 Supercharged, and M113 Supercharged vehicles. The use of this water tank upgrade will allow extended heat dissipation in all climates, and will also allow the user to apply ice to the intercooler system if needed to further chill the air charge temperature as it enters the intake path.

Weistec Engineering Trunk Ice Tank | Image 6

The tank also contains a large capacity ball valve drain system, that will allow the user to quickly drain hot water from the system and add ice between runs.

Weistec Trunk Ice Tank Installed at RSW in New Jersey | Image 7SL55 AMG Trunk Ice Tank | Image 8


  • Precision TIG Welded Aluminum
  • Large mouth fill port for simple addition of ice
  • Complete system will contain approximately 6 US Gallons
  • 2000 G.P.H. Internal bilge pump for added flow and consistency
  • Aerospace grade fittings, wiring, and lines are included for easy installation on Weistec and factory Supercharger systems.
  • Easy drain access with ball valve
  • 3/4" high flow water lines

Dual Pass Heat Exchanger

Intercooling is very important for M113K and M275/M279 powered vehicles.  The Weistec Heat Exchanger has a dual pass design, giving the fluid inside the core more time to be cooled by air as the vehicle is driven down the road.

Sl55 AMG Heat Exchanger Upgrade | Image 9

It also has welded on mounting tabs that allow the heat exchanger to be bolted to the bottom of the bumper beam.  The Weistec Heat Exchanger includes self-tapping screws for mounting.  Hardware for plumbing is not included.


  • Improved asthetics
  • All Aluminum construction
  • Dual pass design
  • Mounting tabs for mounting to bottom of bumper beam
  • Increased cooling capacity

Intercooler Pump Upgrade

The Johnson CM-30 water pump addresses many of the short comings of the factory pump such as poor flow characteristics and pump failure. It offers 50% more flow than the factory Bosch pump and is extremely reliable.

Mercedes M113k Intercooler Pump Upgrade | Image 10

An upgraded intercooler water pump is a highly recommended for stock and modified vehicles.


  • Magnetic coupling prevents damage should the water/coolant mixture freeze
  • 50% more flow than stock pump
  • Improved reliability
  • Direct Bolt in

M113K Exhaust System, SL55

The biggest restriction to making high power with the M113K engine is the limited flow of the factory exhaust manifolds. Whether you want to make as much power as possible with the AMG Kompressor, or are looking to run the Weistec M113K Supercharger Systems, it will be necessary to upgrade to long tube headers.

SL55 AMG Long Tube Header Upgrade | Image 11

To make for the best power possible, the headers feature 2" primaries that allow for as much flow out of the cylinder head as possible. The large primaries and proper O2 sensor placement of these headers work extremely well when coupled with our Software and Supercharger System, resulting in the best performance and drivability out of all the headers that are currently on the market.

SL55 AMG HRE FlowForm RSW Built Exhaust System | Image 12

*Actual system may be different than picture depending on chassis.

Packaged with the headers are 3" Stainless Steel Connector pipes that need to be welded in to connect the headers to the rest of the exhaust system retaining the factory mufflers.


  • All Stainless Construction
  • Tig Welded
  • 2" primaries
  • Connector Pipes
  • Proper O2 Sensor Placement
  • Exhaust Manifold Gaskets Included
  • Up to 120+whp Gains

When your building a 700HP Mercedes Benz AMG, it is crucial to allow the vehicle to transfer as much of that power to the pavement as possible. Our service team would like to introduce you to the Quaife Engineering Limited Slip Differential!

LSD Upgrade SL55AMG NJ at RSW | Image 13

With increased HP there are several other factors that must be taken into account. As the Weistec Engineering Supercharger upgrade is completed on this SL55 AMG our shop foreman takes the time to go over the entire vehicle to ensure everything is ready for road testing. Not to mention ensuring this Mercedes Benz's brake fluid is fresh, and fitting the new HRE Performance Wheels & Michelin Pilot Sport 3's!

Final Inspection of the SL55 AMG Before Delivery | Image 14

Stay tuned for PHASE 2 . . . this 55 AMG will be back in the shop for the RSW Service Team to perform a complete engine upgrade with all forged internals! Interested in taking your Mercedes Benz AMG to the next level? Contact Us.

RSW New Jersey Mercedes Repair Specialist | Image 15


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