High-Flow SS304 Downpipe for BMW X5 F15 (30d, 30xd, 40d)

Unlock the performance of your N57N / N57Z Diesel Engine.

Designed specifically for the BMW X5 (F15 Chassis, 2012–2017), this premium stainless steel downpipe is the ideal upgrade for 30d, 30xd, and 40d diesel models. By replacing the restrictive factory unit, this high-flow pipe significantly reduces backpressure, allowing your turbo to spool faster for improved throttle response and torque.

Constructed entirely from high-grade SS304 Stainless Steel—including both the piping and the flanges—this unit offers superior durability and corrosion resistance compared to stock components.¹ The precision TIG welding ensures smooth internal joints for maximum airflow and structural integrity under high heat.

Key Features & Benefits

• Engineered for Diesel Performance: tailored for the N57N and N57Z inline-6 diesel engines found in the F15 X5 (30d and 40d variants).

• Full SS304 Construction: Unlike cheaper alternatives that use mild steel flanges, this unit uses SS304 Stainless Steel for both the pipe and flanges, preventing rust at the connection points.

• Optimized Airflow: Smooth mandrel bends and clean TIG welding reduce turbulence, lowering Exhaust Gas Temperatures (EGTs) and protecting your turbocharger.²

   

• Show-Quality Finish: Features a stunning Mirror Polished finish that looks professional and resists road grime.

• Robust Build: A 1.5mm pipe thickness strikes the perfect balance between lightweight performance and heavy-duty durability.

Technical Specifications

Packaging & Delivery

• Selling Unit: Single Item

• Package Dimensions: 66 x 38 x 17 cm

• Gross Weight: 3.000 kg

• Handling Time: Ready to ship within 2 days.

Installation Tip: This is a direct replacement for the factory DPF/Cat section for off-road or track use. An ECU tune is recommended to maximize power gains and prevent check engine lights.