Mercedes G 63 AMG W463A: giving the AMG V8 its thunder back, the complete guide

The AMG 4.0 twin-turbo V8: a hand-built engine, held back as it leaves the factory

The 4.0 twin-turbo V8 in your G 63 AMG W463A comes out of AMG's Affalterbach workshops, built according to the "One Man, One Engine" principle: one engine, one engine builder, one signed plaque. Turbos nestled in the vee, massive torque, volcanic character. But recent regulations have forced an OPF and oversized silencers on it: the AMG V8, famous for its thunder, has become polite. For many owners, it is a betrayal of the AMG spirit.

The Rog exhaust puts right that betrayal: a free-flowing layout, controllable valves, and the V8 gets back the deep rumble punctuated by bangs on the overrun that made AMG a legend. With the valves closed, your Mercedes becomes a limousine again.

What makes up the exhaust on your Mercedes-AMG G63 W463A V8 biturbo

An exhaust system is best understood in two parts. Here is what each one does, and what Rog replaces.

Your Mercedes-AMG G63 W463A V8 biturbo in figures

What an exhaust changes straight away is the sound, the engine's breathing and the weight at the rear. For more power, add an ECU remap.

Published factory and Stage 2 figures.

With or without an ECU remap, the exhaust fits and works. But it is an ECU remap at an approved tuning centre that truly unlocks your Mercedes-AMG G63 W463A V8 biturbo, and that is what we recommend.

To be completely transparent: the exhaust alone brings better breathing and sound, while Stage 2 brings the transformation. The AMG V8 is known among tuners for handling power comfortably: with the Rog exhaust and an ECU remap at an approved tuning centre, the figures above stay within the reliability range of an engine designed with headroom.

Configuring your exhaust, step by step

3 choices, in the same order as the product page configurator.

1. 1

   Step 1 of 3: Material: stainless steel or titanium

   Titanium costs more than stainless steel; the price of each version is shown on the product page, in your currency.

   304 stainless steel

   Weight

   Baseline

   Sound

   Full and rounded

   Durable, corrosion-resistant, with a rounded, full sound: the most popular option.

   Titanium

   Weight

   Around 40% lighter

   Sound

   Metallic, crystal-clear

   For the same design, it weighs around 40% less than stainless steel. A more metallic note at high revs and a look all of its own, from brushed to blued.

   Both materials age well: 304 stainless steel copes with winter and salt, and titanium does not rust. Stainless steel or titanium: what really changes.

2. 2

   Step 2 of 3: Front section: downpipe and catalytic converter

   Optional: the downpipe on your Mercedes-AMG G63 W463A V8 biturbo, with its catalytic converter. Sound rating out of 10, valves open: the factory exhaust sits at 3.

   Cat-back only

   Included

   7/10

   Factory emissions control

   Nothing changes at the front: the cat-back alone is already enough to change the car.

   200-cell sports catalytic converter

   8/10

   Road use and inspection

   The everyday compromise: emissions control is still there, and breathing improves noticeably.

   100-cell sports catalytic converter

   9/10

   Inspection: depends on local rules

   One step further: more flow, a more aggressive sound, reduced emissions control.

   Decat

   10/10

   Track use

   Everything unleashed: maximum flow and unrestrained sound, for the track.

   Sound intensity, on a scale of 0 to 10

   1. 10/10Decat downpipe + Rog cat-back
   2. 9/10100-cell sports catalytic converter + Rog cat-back
   3. 8/10200-cell sports catalytic converter + Rog cat-back
   4. 7/10Rog cat-back only, factory catalytic converter retained
   5. 3/10Factory exhaust, for comparison

   Valves open. With the valves closed, every configuration becomes discreet again.

   What about the engine warning light? With a sports cat, it can come on with some engines: the sensor placed after the catalytic converter measures a different level of emissions control from the original. It is not a mechanical failure, but a warning light should never be masked or cleared without dealing with its cause: the right answer is a catalytic converter suited to the engine, with a map by a tuner who takes it into account. The decat version, for track use only, almost always triggers it. If this happens to you, write to us and we will point you in the right direction. Passing vehicle inspection with a sports exhaust.

3. 3

   Step 3 of 3: Valves: Rog remote or factory control

   Two ways to control the valves on your Mercedes-AMG G63 W463A V8 biturbo.

   Rog remote

   

   The simplest solution: a control unit in the boot and a remote, open or closed at the press of a button, whatever mode you are in. A question while fitting? We will get back to you.

   Factory control

   • Only for vehicles fitted with factory valves
   • Controlled by the drive modes

   Does your vehicle have factory valves? The exhaust keeps their existing control: the drive modes operate the valves, as before, with no added electronics.

   On a long journey, what matters is the absence of drone at a steady speed. With the valves closed, the exhaust keeps the cabin calm; the show is still there whenever you ask for it. More about exhaust drone.

The Rog sound signature on the AMG V8

The AMG V8 has a sound identity recognised worldwide: a deep, rolling thunder punctuated by sharp bangs on the overrun. Our exhaust removes what stifles it and restores that signature in full with the valves open. With the valves closed, the V8 turns hushed again: the limousine and the muscle car in the same vehicle.

From order to fitting

1. Configuration

   You choose the options for your Mercedes-AMG G63 W463A V8 biturbo and enter its VIN, found in box E of the registration document or at the base of the windscreen.

2. Check

   We confirm compatibility with your car before we build it.

3. Manufacturing

   Made to order, for your Mercedes-AMG G63 W463A V8 biturbo.

4. Delivery

   Free, insured delivery, with tracking sent on dispatch.

5. Fitting

   Clamps and gaskets, no welding: two hours on average at the garage of your choice.

20 working days from order confirmation to delivery

Warranty

3 years, parts and workmanship, from the date of purchase

Payment

Card, PayPal or bank transfer

Installation

At the garage of your choice

What about the manufacturer's warranty? In Europe, fitting a part from another brand is not enough on its own to void it; the manufacturer has to prove the link between that part and the fault. Our article on the manufacturer's warranty.

Our recommendations for your Mercedes-AMG G63 W463A V8 biturbo

• Daily driving

  • Stainless
  • Cat-back only
  • Rog remote

  Your Mercedes-AMG G63 W463A V8 biturbo stays easy to live with, the factory emissions control is retained, and you open the valves whenever you decide.

  View this configuration

• Fast road

  • Titanium
  • 200-cell downpipe
  • ECU remap

  For great roads: more voice and more response, while staying road-friendly.

  View this configuration

• Track

  • Titanium
  • Decat downpipe
  • Stage 2

  The most extreme configuration, for track use only.

  View this configuration

These profiles are starting points. The right choice is often made in a few messages.

Mercedes-AMG G63 W463A V8 biturbo: your questions

Further reading

• All Mercedes-AMG exhaust systems
• Mercedes-AMG G63 W463 5.5 V8 biturbo
• Mercedes-Benz G550 W463A 4.0 V8 biturbo
• Mercedes-AMG GLC63 / GLC63 S X253 4.0 V8 biturbo
• Stage 2: the role of the downpipe
• How to pass vehicle inspection with a modified exhaust
• Pop & Bang: how it works, and is it risky?
• The 28 brands we cover