The Azure Performance BMW G0X B58 | X3 / X4 M40i | Downpipe is engineered to optimize flow from the potent B58 engine. Designed to reduce backpressure and increase power, this downpipe delivers sharper response, more torque, and a deeper, sportier exhaust note—especially when paired with ECU tuning.

Features

• Constructed from high-grade SS304 stainless steel for durability and corrosion resistance.
• Available in Catless or 200 Cell Catted configurations.
• Optional Azure Heat Shield for superior thermal protection.
• Professional sand-blasted finish for an OEM+ appearance.
• Direct bolt-on replacement with no cutting or welding required.
• Optimised for reduced turbo lag and improved turbo spool.
• Designed for track use only; ECU tuning recommended for peak performance.

Product Fitment

Performance Gains

*Performance gains are based on proper ECU tuning and supporting modifications.