Experience the ultimate upgrade in exhaust performance with the CRT Performance Single Midpipe 4”, designed specifically for the BMW M3/M4 G8X platform. Engineered for maximum flow and durability, this midpipe transforms both the performance and tone of your S58 engine, delivering raw power and refined sound — all while retaining OEM fitment and comfort for daily use.

Performance Redefined – 4” Free-Flow Power

With a full 4-inch (101.6 mm) diameter, the CRT Single Midpipe dramatically reduces backpressure and enhances turbocharger efficiency. The result is smoother power delivery, faster throttle response, and increased tuning potential – especially on Stage 2 and Stage 3 setups.

Dual Resonators – Balanced, Refined Sound

Two precisely tuned resonators deliver the perfect harmony between aggression and refinement. Expect a deep, motorsport-inspired tone without intrusive drone or excessive cabin noise. Ideal for both spirited drives and long-distance cruising.

Premium Construction

• Material: High-grade T304 stainless steel – heat- and corrosion-resistant for long-term durability.

• Precision TIG Welding: Handcrafted with attention to detail for maximum strength and a flawless finish.

• Integrated Thermal Shield: Protects underbody components from heat buildup, maintaining system stability under demanding conditions.

OEM-Level Fitment

Designed for plug & play installation – no cutting, welding, or modification required. The CRT 4” Midpipe replaces the factory unit directly, ensuring perfect alignment with OEM and aftermarket exhaust systems.

Technical Specifications

• Diameter: 4” (101.6 mm)

• Configuration: Single midpipe with dual resonators

• Material: T304 stainless steel

• Mounting: Plug & Play, OEM fitment

• Integrated thermal shield for heat protection

• Removes factory OPF/GPF filters (for off-road/track use only)

Usage Notes

This midpipe removes the factory OPF/GPF filters and is intended solely for off-road or track use.
Installation may trigger a Check Engine Light (CEL) or ECU safety mode if no supporting software or hardware is used.

To ensure proper operation, CRT recommends:

• OPF-delete cables

• CAN MIL-delete module

Compatibility

• BMW M3 G80 Sedan (2020+)

• BMW M3 G81 Touring (2022+)

• BMW M4 G82 Coupe (2020+)

• BMW M4 G83 Convertible (2020+)

Warranty

Backed by a 2-year CRT Performance warranty, guaranteeing exceptional craftsmanship and long-lasting reliability.