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M157 Downpipes and Exhaust, S63 RWD
Purchase M157 Downpipes and Exhaust, S63 RWD
  • SKU: 01-157-00845-1

    M157 Downpipes and Exhaust, S63 RWD

  • Gains are at the engine or "crank". Actual gains are dependent on the model, model year, fuel octane, engine health, and environmental conditions. Learn More

  • $2,999.99

  • 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 760
Weistec Torque 852
Manufacturer Weistec
Street legal in all the US States No
Engine Family M157
Stock Horsepower 577
See more
year make model trim engine
2013 Mercedes-Benz S63 AMG Base (W221) Twin Turbo 5.5L V8 (M157)
2012 Mercedes-Benz S63 AMG Base (W221) Twin Turbo 5.5L V8 (M157)
2011 Mercedes-Benz S63 AMG Base (W221) Twin Turbo 5.5L V8 (M157)

Weistec Engineering offers True Downpipes for M157 AMG and M278 powered vehicles. Replacing the small and restrictive factory downpipes delivers significant gains in power, throttle response, and exhaust tone.

Engineered and designed with the most sophisticated Computer Aided Design tools, excellent fitment and the highest performance possible are guaranteed. Each downpipe has a specially designed CNC machined turbo outlet flange, transitioning into a 3 inch pipe and low profile V-Band flanges to mate with our Midpipes.

Downpipes come standard with external Titanium Ceramic Coating and internal Copper Ceramic coating to keep heat inside the piping, helping improve exhaust velocity and reduce engine bay temperatures.

Branded Weistec stainless steel heat shields are also included to block rising heat from the exhaust manifold.

Our Biturbo Midpipes bolt to the Downpipes using a low profile V-Band flange and transition to the factory axle-back. Each Mid-pipe has stainless steel brackets for solid bolt-in fitment and is made of 3 inch stainless steel piping creating a very high flowing quality exhaust system.

Complete exhaust system includes Downpipes, Midpipes, Heat Shields, Gaskets, and Hardware.

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

Key Features:

  • 100% mandrel bent and TIG welded

  • Constructed of low carbon 304 Stainless Steel

  • Stainless steel heat shields offer the Weistec look and function

  • Bolt-on installation

  • Improved exhaust note

  • Improved exhaust flow