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    • Fabspeed 2019 on G63 AMG M177 V8 products - Valvetronic exhaust, secondary cat bypass, and ECU tune

      The G-Wagon just keeps on going and we are grateful Mercedes continues to update and improve the model. The most recent G63 AMG is powered by a 4.0 liter M177 twin turbo V8 and despite being a heavy 5800+ pound behemoth it moves well thanks in part to the new 9-speed transmission.


      For those looking to get a bit more out of their G63 AMG, Fabspeed has some great products now available.

      Let's start with their Valvetronic exhaust.


      Exhaust Valves: These devices fit into the live exhaust stream and can steer the exhaust flow through different sections of the system.

      They are expected to operate in the highly hostile environment of hot, pressurized exhaust flow.

      OEM valves are usually very good. They have standard features such as durable pneumatic actuators, flat sealing faces inside the valve, stiffening ribs and high-temperature bearings at both ends of the butterfly spindle.

      But when youíre adding more power and a less restrictive exhaust design, Fabspeed knows that the OEM valves may exceed their design limits. We source competition quality valves that can withstand the extreme stressors introduced by engines that make more power, and flow large volumes of hot gases under higher pressures.

      Valves Closed: When the valves are closed, the exhaust is routed through the resonators, allowing the exhaust gases to harmonize in the open chambers and dissipate. This maintains a volume level similar to stock while adding a pleasant exhaust tone.

      Valves Open: When you open the valves, the flow of exhaust now takes the path of least resistance, down a straight-through stainless steel pipe inside the muffler, bypassing the sound chamber, and exiting. This results in a more aggressive and pronounced tone.
      Secondary Cat Bypass Pipes


      To complement the Valvetronic Exhaust System, Fabspeed also developed a secondary Cat Bypass system for the G63 G-Wagen that added a whopping +61 wheel HP and +54 lb-ft of torque when paired with our performance ECU Tune. This unique Fabspeed bypass system allows you to eliminate the heavy and restrictive factory secondary catalytic converters with lighter, high-flowing stainless steel downpipes that not only added some power but also produce a new exhilarating sound - all without the worry of a check engine light.
      Now pair those exhaust pieces with some M177 ECU software and you have quite power bump:


      Over 600 horsepower at all four wheels and torque approaching the 700 lb-ft at the wheels mark.

      It is well worth uncorking your G63.

      This article was originally published in forum thread: Fabspeed 2019 on G63 AMG M177 V8 products - Valvetronic exhaust, secondary cat bypass, and ECU tune started by Sticky View original post