MAD BMW S58 Resonated H-Pipe Midpipe – M3 M4 G80 G82 G83 Upgrade your BMW M3 or M4’s sound and flow with the MAD Resonated H-Pipe Midpipe, designed specifically for the S58-powered G80, G82, and G83 platforms. This midpipe maintains the factory-style H-pipe configuration with two separate pipes merging through a crossover section, preserving the stock layout while enhancing performance. The OEM midpipe features two secondary catalytic converters and large resonators that restrict airflow and dull the exhaust tone. The MAD Resonated H-Pipe replaces those with a higher-flowing setup that eliminates the secondary flow restrictions and uses compact, carefully tuned resonators to refine the exhaust character. The result is a noticeable increase in volume and tone without introducing excessive drone or harshness. It’s the ideal solution for drivers who want a deeper, more pronounced exhaust note while maintaining a smooth, refined sound throughout the RPM range. Factory-style dual midpipe H-pipe design Increased exhaust flow with clean, sporty tone Dual smaller resonators help reduce unwanted frequencies Direct bolt-on fitment to OEM or aftermarket components Constructed from high-grade stainless steel for durability Fitment: 2021+ BMW M3 G80 (Sedan) 2021+ BMW M3 G81 (Touring) 2021+ BMW M4 G82 (Coupe) 2021+ BMW M4 G83 (Convertible) Fits all S58-powered M3 and M4 variants, including rear-wheel drive and xDrive models. What's Included: Full dual midpipe H-pipe assembly All required clamps and hardware for installation Requires cutting only if used with the stock axle back. No cutting needed when paired with the MAD axle back or any other compatible aftermarket axle back. Bolts up directly on the downpipe side with both the factory and any aftermarket downpipes. This product is intended for off-road or competition use only where emissions compliance is not required. Always check local laws and regulations before installing aftermarket exhaust components.