Mercedes GLS63 (W167) Downpipes

2021–2026 Mercedes-AMG GLS 63 (X167, M177)

• Optimized internal design to reduce backpressure and improve exhaust flow
• Built to support increased power and faster turbo spool on tuned/stock vehicles
• Direct bolt-on replacement for the factory downpipe using OEM mounting points
• Compatible with factory and most aftermarket exhaust systems (where applicable)
• Constructed from high-grade, TIG-welded 304 stainless steel for strength and corrosion resistance
• CNC-machined flanges / cast inlets for precise, leak-free fitment
• Engineered for clean, hassle-free installation no cutting or welding required

The AZ Motorsport downpipe is built for Mercedes-Benz owners who want real performance gains without compromising fitment or reliability. By replacing the restrictive factory downpipe with a free-flowing 304 stainless design, it reduces backpressure, improves exhaust flow and turbo response, and helps unlock more power when paired with proper tuning.

Clean welds, precise fitment, and proven results are why Mercedes-Benz drivers choose AZ Motorsport, your go-to brand for performance exhaust and downpipes.

OFF-ROAD / RACE USE ONLY
This product is designed exclusively for closed-course competition and off-road racing vehicles. It is not legal for use on public roads or on vehicles required to comply with emissions regulations in Canada or the United States. Installing this product on any pollution-controlled, registered, or street-driven vehicle may violate federal, state/provincial, and local laws.

By purchasing this product, you acknowledge and agree that:
This product does not meet applicable emissions standards and is not C.A.R.B. compliant.
AZ Motorsport makes no representations or warranties that this product is legal for any use other than closed-course competition.
You are solely responsible for understanding and complying with all laws and regulations that may apply to the purchase, installation, and use of this product.