Untd. Performance Catted Downpipe W/Shield – Mercedes-Benz AMG S63 M177 W222 4.0L 2019+

Elevate your AMG S63 to its true potential with the Untd. Performance Catted Downpipe w/ Heat Shield—precision-engineered for the 2019+ W222 platform powered by the M177 4.0L Biturbo V8. Designed for enthusiasts who demand maximum performance without compromising refinement, this downpipe offers enhanced exhaust flow, improved turbo response, and a deeper, more commanding exhaust note—all while retaining a high-flow catalytic converter and integrated heat shielding for optimal drivability.

Key Features:

High-Flow Catted Design for Balanced Performance
Featuring a premium 200-cell high-efficiency catalytic converter, this downpipe strikes the perfect balance between raw performance and street legality. It reduces backpressure significantly over stock, allowing your M177 twin-turbo V8 to breathe better and deliver stronger torque, horsepower, and throttle response—ideal for tuned and daily-driven AMG S63 models.

Integrated Heat Shielding
Thermal protection is critical in a tightly packed, high-output engine bay. This version includes a laser-cut, brushed stainless steel heat shield to insulate surrounding components from radiant heat—improving under-hood reliability and maintaining consistent turbo performance under load.

Aggressive but Refined Exhaust Note
Upgrade the sound of your S63 AMG without going full race mode. The high-flow cat keeps the tone crisp and deep without harsh rasp or excessive drone. Expect more pronounced turbo spool, sharper response, and a signature AMG growl that makes a powerful statement without compromising luxury.

Optimized for Tuned Builds
Whether you’re running an ECU flash or full Stage 2 setup, this downpipe is built to support elevated boost levels and power demands. Combined with tuning, expect noticeable improvements in spool time, midrange torque, and peak output—perfect for those pushing the limits of their M177-powered W222 S63.

Motorsport-Grade Construction
Constructed from TIG-welded 304 stainless steel and built to withstand extreme heat and pressure, this downpipe is both lightweight and durable. CNC-machined flanges ensure leak-free fitment, while the included heat shielding provides lasting performance under heavy load.

Direct Bolt-On Fitment
Designed as a direct replacement for the factory unit, this downpipe bolts to your stock turbo and exhaust system with no cutting or welding required—making it an ideal upgrade for both shop installs and advanced DIYers.

Compatibility:

• Mercedes-Benz S63 AMG W222 (2019+)

• Engine: M177 4.0L Biturbo V8
  ✅ Compatible with OEM and aftermarket exhaust systems. Best results with ECU tuning.

For AMG owners seeking refined power, elevated sound, and reliable thermal control, the Untd. Performance Catted Downpipe w/ Heat Shield is the definitive upgrade. It’s engineered to meet the expectations of high-performance luxury without compromising daily drivability.

⚠️ Note: While this product features a high-flow catalytic converter, it is not guaranteed to be emissions-legal in all regions. Please verify compliance with your local regulations before installation. Intended for off-road or motorsport use.