BMW G82/G83 M4 Performance Exhaust Downpipe Set – High-Flow Design for Maximum Power | Fits G82 Coupe and G83 Convertible M4 and Competition Models (2021+) – S58 3.0L Twin-Turbo I6 Engine

Unleash the unfiltered aggression and raw potential of your BMW G80 M3 with the BAVMODS® Performance Exhaust Downpipe Set — a precision-engineered upgrade designed to free the S58’s twin-turbo powerhouse from the restrictive factory system that holds it back.

From the factory, the G8X M4's downpipes are heavily restricted with dense catalytic converters that trap heat and choke flow. Our high-flow downpipes replace that bottleneck with smooth, unrestricted tubing that dramatically improves exhaust velocity, turbo spool response, and midrange torque — all while unlocking the signature deep, resonant M growl that defines the G-series M lineup.

Each pipe is built from premium T304 stainless steel and features CNC-machined flanges, hand TIG welds, and flex joints designed to withstand extreme heat and vibration under heavy boost. The result is a system that doesn’t just sound better — it performs with measurable gains, providing faster turbo response, reduced backpressure, and smoother power delivery throughout the RPM range.

Designed with precision fitment in mind, this downpipe set bolts directly to the factory or aftermarket exhaust system using all OEM sensor locations and mounting points. The installation is fully reversible and maintains proper O₂ sensor functionality. Whether you’re running a stock tune or a Stage 2 ECU map, this system delivers uncompromised performance and intoxicating sound.

Key Features

• High-Flow Exhaust Design – Reduces backpressure for maximum exhaust velocity and turbo efficiency
• T304 Stainless Steel Construction – Corrosion-resistant, durable, and heat-tolerant under track conditions
• Mandrel-Bent Tubing – Smooth internal geometry for uninterrupted exhaust gas flow
• Precision TIG Welds – Handcrafted seams ensure strength, reliability, and leak-free performance
• OEM Sensor Integration – Pre-fitted O₂ bungs allow seamless plug-and-play installation
• Flex Joint Design – Absorbs vibration and prevents cracking under dynamic load
• Aggressive Exhaust Note – Deep, powerful sound that enhances the M3’s commanding presence
• Direct Bolt-On Fitment – Designed for factory compatibility and easy installation

Performance Benefits

• Faster turbo spool and improved throttle response
• Noticeable increase in midrange torque and horsepower
• Reduced turbo lag for a sharper, more connected driving experience
• Lower exhaust gas temperatures and improved flow efficiency
• Raw, motorsport-inspired exhaust tone that brings the S58 to life
• Compatible with factory or performance exhaust systems

FITMENT:

• BMW G82 M4 Coupe (2021+)
• BMW G83 M4 Convertibel (2021+)

ENGINE COMPATIBILITY: S58B30T0 3.0L Twin-Turbo Inline-Six

NOTE: For off-road or competition use only. Professional installation is recommended to ensure proper sensor alignment and sealing. Pairing with an ECU tune is highly recommended to fully unlock performance potential and eliminate CEL codes.

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