BMW G80 M3 & G82/G83 M4 Valved Stainless Steel Catback Exhaust System – Loud Straight-Pipe Sound, Crackles & Pops, OEM+ Performance Upgrade (Clearance Unit, Ready to Ship, Missing 2 of 4 Exhaust Tips) (2021+)

Transform your BMW G80 M3, G81 M3 Touring, G82 M4 Coupe, or G83 M4 Convertible with our Valved Stainless Steel Catback Exhaust System, crafted for enthusiasts who crave the perfect balance between everyday drivability and track-ready performance.

Featuring remote-controlled valves, you can choose between a refined, comfortable cruise or unleash a raw, ferocious exhaust note with the press of a button. Designed for both OEM+ refinement and true motorsport character, this system delivers a deep, throaty growl that perfectly complements the G8X platform’s S58 engine.

Engineered for the S58 Powerhouse

The S58 twin-turbo inline-six is one of BMW M’s most celebrated engines, blending immense power, rapid throttle response, and race-proven performance.

Its advanced twin-turbo design produces incredible torque throughout the rev range. To make the most of it, a free-flowing catback exhaust allows exhaust gases to escape more efficiently, reduces restriction, and produces a sound worthy of an M badge.

Sound & Performance Benefits

Experience the full potential of your BMW G8X through precision-engineered acoustics. With the valves closed, the system provides a more controlled and comfortable exhaust tone for everyday driving. Open the valves, and the exhaust delivers a much louder, deeper, and more aggressive sound that transforms every startup, acceleration pull, gear change, and downshift.

The true dual-pipe layout helps improve exhaust flow and exhaust velocity while maintaining an OEM-style fitment. Stainless steel enhances the S58’s natural tone, producing a muscular growl at lower RPMs and a roaring, race-inspired sound at higher RPMs.

Depending on your vehicle’s driving mode, factory programming, tune, downpipes, and additional modifications, the system may also enhance crackles, pops, and overrun sounds during gear changes and deceleration.

Why Stainless Steel — Strength, Sound, and Value

Stainless steel exhaust systems are known for their distinctively rich and throaty tone, making them a favorite among enthusiasts seeking a classic European performance-car sound.

Engineered from high-grade T304 stainless steel, this system offers an ideal balance of durability, sound depth, corrosion resistance, and overall value while maintaining an OEM-like fit and finish.

Unlike titanium, which produces a sharper and more metallic note, stainless steel delivers a warmer and deeper resonance that sounds smoother and more mature. It is the perfect choice for enthusiasts who want a refined yet powerful soundtrack without entering the ultra-premium titanium price range.

Built to endure years of spirited driving, the stainless steel construction resists corrosion, extreme temperatures, and repeated heat cycling while maintaining its structural integrity and appearance.

Key Features

• T304 Stainless Steel Construction: Offers excellent tensile strength, corrosion resistance, heat resistance, and a consistent exhaust tone under demanding driving conditions.
• Remote-Controlled Valved System: Switch between a more refined cruising tone and maximum sound and aggression at the press of a button.
• True Dual Catback Layout: Helps reduce exhaust restriction and improve exhaust flow while preserving OEM-style mounting and ground clearance.
• Deep, Throaty Exhaust Tone: Produces a muscular low-RPM growl and a louder, race-inspired sound under acceleration.
• Enhanced Crackles & Pops: Accentuates factory or tuned exhaust overrun sounds depending on the vehicle’s programming, driving mode, and supporting modifications.
• Hand-Finished Welds: Precision-welded for strength, durability, and a clean premium appearance.
• OEM+ Design Philosophy: Combines factory-style fitment and reliability with more aggressive acoustics and visual appeal.
• Bolt-On Installation: Designed to install using the vehicle’s factory-style mounting points without major fabrication or cutting.

Included Components

• Valved stainless steel catback exhaust system
• Remote controls and valve-control components
• Plug-and-play valve wiring harness
• Clamps, gaskets, mounting hardware, and installation accessories
• Two stainless steel exhaust tips

IMPORTANT CLEARANCE CONDITION & EXHAUST-TIP DISCLAIMER

This is a discounted clearance exhaust system that is currently in stock and ready to ship.

A complete version of this exhaust system normally includes four exhaust tips. This specific clearance unit is missing two of the original four exhaust tips and will include only two exhaust tips.

The customer will be responsible for sourcing two additional compatible exhaust tips if a complete four-tip configuration is desired. The missing exhaust tips do not affect the operation of the exhaust piping, muffler sections, valves, wiring, or valve-control system, but additional tips will be required to complete the intended quad-tip appearance.

Please carefully review all product photos before ordering to confirm the condition, finish, and included components. Due to the significant clearance discount and the clearly disclosed missing exhaust tips, this unit is sold in its stated condition.

FITMENT

• BMW G80 M3 Sedan
• BMW G80 M3 Competition Sedan
• BMW G80 M3 Competition xDrive Sedan
• BMW G81 M3 Touring
• BMW G81 M3 Competition xDrive Touring
• BMW G82 M4 Coupe
• BMW G82 M4 Competition Coupe
• BMW G82 M4 Competition xDrive Coupe
• BMW G83 M4 Convertible
• BMW G83 M4 Competition Convertible
• BMW G83 M4 Competition xDrive Convertible
• Compatible with BMW G8X models equipped with the S58 twin-turbo inline-six engine.

Professional installation is recommended to ensure proper alignment, valve operation, exhaust-tip positioning, ground clearance, and leak-free connections. Fitment may vary on vehicles equipped with aftermarket downpipes, modified factory exhaust components, non-factory rear diffusers, center-exit conversions, or other exhaust modifications.

IMPORTANT SALE TERMS

This specific exhaust system is already fabricated, currently in stock, and ready to ship. The standard custom-fabrication lead time does not apply to this clearance unit.

Because the missing exhaust tips and clearance condition are clearly disclosed before purchase, the missing tips cannot be used as the basis for a return or refund.

Due to the size, weight, substantial shipping cost, and discounted clearance pricing of this exhaust system, full returns are not accepted. However, if there is ever a verified fitment or functional issue unrelated to the disclosed missing exhaust tips, our team will review the issue with proper installation documentation and make sure you are taken care of.

Your BMW G8X deserves a soundtrack as powerful as its performance.

Our Valved Stainless Steel Catback Exhaust System delivers the ideal combination of deep tone, OEM+ quality, modern valve control, and exceptional value — turning every startup, rev, acceleration pull, and downshift into an event.

Please refer to the “Fitment” section in the product description for compatibility details.