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Weistec M156 Exhaust System Mercedes-Benz C63|CLK63|CLS63|E63|ML63|SL63 AMG 07-14



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Model #01-156-00956-3

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This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

The biggest restriction to making high power with the M156 engine is the limited flow of the factory exhaust manifolds. Whether you want to make as much power as possible naturally aspirated, or are looking to run Weistec's M156 Stage 2 or a Stage 3 Supercharger Systems, it will be necessary to upgrade to long tube headers.

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 Stage 2 and Stage 3 supercharger systems resulting in the best performance and drivability out of all the headers that are currently on the market.

Packaged with the headers are 3" Stainless Steel Midpipes, and a 3" Stainless Steel X Pipe resulting in a bolt on installation that retains the factory resonator and mufflers. When paired with Weistec ECU Upgrade and Weistec High Flow Air Filters, power gains are typically 90+hp at the wheels for naturally aspirated vehicles. These headers are required for Stage 2, and Stage 3 Supercharger Systems to achieve advertised power.


  • All stainless construction
  • Tig welded
  • 2" primaries
  • Midpipes and X Pipe
  • Proper O2 sensor placement
  • Exhaust manifold gaskets included
  • Signifigant horsepower gains
  • Bolt in, no cutting
  • Weistec Horsepower: 571 (Stock - 451)
  • Weistec Torque: 530 (Stock - 443)
  • Engine: M156
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  • Actual system may be different than the image(s) depending on chassis.

Proposition 65

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Vehicle Engine Notes
Mercedes-Benz C63 AMG

Mercedes-Benz CLK63 AMG

Mercedes-Benz CLS63 AMG

Mercedes-Benz E63 AMG

Mercedes-Benz ML63 AMG

Mercedes-Benz SL63 AMG

Weistec Limited Warranty

1. Warranty on Weistec Turbocharger Systems, Supercharger Systems, Exhaust Systems and Engine Accessories

12 month Weistec Limited Warranty. Valid 12 months from sales date with valid registration.The following exclusions apply to all Weistec Limited Warranties.

Weistec's limited warranties do not cover any of the following damages or items:
  • Damages to and/or failure of any non-Weistec component or equipment on a vehicle including, but not limited to, the engine, electrical system, transmission and differentials.
  • Damage caused by "Acts of God", normal wear and tear, or damage to a vehicle or engine caused by, tuning by others, collision and/or engine failure.
  • Any costs incurred for towing or downtime of the vehicle.
  • Any rental vehicle costs
  • Any labor costs to diagnose problems or to remove or replace the Weistec products; or any damage caused by the use of another company's product.
  • Any shipping costs.

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