BMW G80/G82 M3/M4 Stainless Steel Valved Performance Catback Exhaust

Upgrade the sound, performance, and driving experience of your BMW G80 M3 with this premium Stainless Steel Valved Performance Exhaust System — engineered to deliver aggressive tone, improved exhaust flow, and independent Varex valve control while maintaining everyday drivability.

Designed specifically for the twin-turbocharged S58 platform, this valved exhaust transforms the G80 M3 with a deeper, sharper, and more exotic exhaust note while reducing restriction compared to the factory system. Whether cruising with the valves closed or unleashing the full sound with the valves open, this system delivers the perfect balance between refinement and motorsport aggression.

Manufactured from high-quality T304 stainless steel with precision TIG-welded construction, this exhaust system is built to withstand high temperatures, hard driving conditions, and long-term performance use without compromise.

Key Features

Full T304 Stainless Steel Construction

Built from premium-grade stainless steel for superior durability, corrosion resistance, and long-term reliability under extreme exhaust temperatures.

Independent Varex Valve System

Rather than reusing the restricted factory valves, this system operates its own dedicated valve assembly with complete travel in both directions. Sealed when closed for a quieter OEM+ driving experience, and fully unobstructed when open for a fully aggressive exhaust tone.

Optimised Exhaust Flow

Mandrel-bent piping and a less restrictive design improve exhaust scavenging, turbo efficiency, and overall engine response.

Aggressive Motorsport-Inspired Sound

Produces a deeper, sharper, and more refined tone with enhanced crackles, turbo response, and high-RPM character.

Precision TIG Welded

Professionally TIG welded for maximum strength, durability, and premium craftsmanship.

Direct Bolt-On Installation

Designed specifically for the BMW G80 M3 platform using factory mounting locations for straightforward installation.

Performance Benefits

When paired with supporting modifications and tuning, this exhaust system can provide:

• Improved exhaust flow and reduced backpressure
• Faster turbo response and sharper throttle feel
• Increased exhaust volume and enhanced tone
• More aggressive cold starts and overrun character
• Weight reduction compared to the factory exhaust system

Performance gains may vary depending on supporting modifications and tuning.

Vehicle Fitment

BMW G80 M3 (2021+)
BMW G82 / G83 M4 (Compatible variants depending on configuration)

3.0L Twin-Turbocharged S58 Engine

Which OPF Option Do I Need?

European-delivered cars are fitted with a particulate filter (OPF/GPF) in the exhaust. Australian and North American cars are not. The two specifications use different exhaust hardware, so choosing correctly ensures a precise, bolt-on fit.

NON OPF - AU/US SPEC — for vehicles delivered new in Australia, New Zealand, the United States or Canada.

OPF EQUIPPED - EU SPEC — for vehicles delivered new in the European Union or the United Kingdom.

UNSURE - CONTACT US — select this and our team will confirm the correct specification against your VIN before dispatch.

Please Note

This product is intended for off-road or motorsport use where applicable.
Customers are responsible for checking local noise and emissions regulations prior to installation.

Why Choose Proven Performance Parts

We specialise in high-performance upgrades for European performance vehicles including Volkswagen GTI & R models, Audi S/RS platforms, and high-performance BMW applications. Every product we offer is carefully selected for its quality, fitment, sound, and real-world performance — tested by enthusiasts, for enthusiasts.