The Azure Performance Downpipe is the ultimate exhaust upgrade for BMW 40i models equipped with the updated B58N engine. Designed to increase exhaust flow and reduce back pressure, this downpipe unleashes significant gains in horsepower and torque, especially when paired with ECU tuning. Finished in a premium sand-blasted texture and available with or without our signature Azure Heat Shield.

Features

• High-grade stainless steel (SS304) construction for durability and heat resistance.
• Available in Catless and 200 Cell Catted configurations.
• Optional Azure Heat Shield for thermal management and improved engine bay aesthetics.
• Professional sand-blasted finish for a clean and refined appearance.
• Direct bolt-on fitment for OEM downpipe replacement with no modifications required.
• Designed for track use only; ECU tuning is required to achieve full performance gains.

Product Fitment

Performance Gains

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

About Azure Performance

Azure Performance is a performance-driven brand specializing in premium exhaust systems and downpipes for modern high-performance vehicles. Built on precision engineering and real-world testing, Azure Performance is focused on delivering noticeable gains in power, response, and sound.

Every system is carefully designed and manufactured using high-grade materials such as SS304 stainless steel, titanium, and Inconel, ensuring exceptional durability and thermal performance. By optimizing exhaust flow and reducing backpressure, Azure Performance upgrades improve drivability while unlocking stronger, more consistent performance.

Azure Performance continues to set a higher standard in exhaust engineering by combining performance-focused design, premium materials, and uncompromising build quality—created for drivers who want a true upgrade every time they press the throttle.