BMW S58 M3/M4 (G80/G82) Race Exhaust System

Key Features

• Two Material Choices: Go T304 stainless steel for daily-driven toughness, or titanium for a lighter, more premium setup.
• Valved Control, Your Way: Choose OEM-style valve integration for factory-style operation, or the remote valve kit for instant open/close control on demand.
• Two Personalities in One Exhaust: Keep it civilized when you need to, then open the valves for a sharper, more aggressive tone.
• Flow-Focused Layout: Built to move exhaust gas efficiently for cleaner response and a stronger pull through the RPM range.
• Factory-Clean Fitment: Designed around OEM mounting points and alignment for a proper bolt-on install and a tidy look underneath.
• Built Like It Should Be: Precision TIG welding for strength, consistency, and long-term reliability.
• Install-Ready Setup: Everything needed for installation is included based on the variant you select (material + valve option).

Product Overview

The AZ Motorsport Valved Exhaust is built for enthusiasts who want a better tone and a more responsive feel without compromising fitment or reliability. It replaces the factory rear section with a higher flow design for a deeper, more aggressive sound and improved flow through the rev range.

Choose T304 stainless steel or titanium, and select OEM style valve integration or a remote valve system for on demand control. Clean welds, precise alignment, and real world durability are why drivers choose AZ Motorsport.

Important Notice:

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.

Flame Tune Note: For setups running big flames, we recommend stainless steel over titanium due to the higher heat load. Titanium is still a premium option—stainless is simply the better choice when you’re pushing extreme flame maps.