$595.00 USD
$595.00 USD








Unleash the full airflow potential of your BMW S58 engine with the MAD High Flow Turbo Inlets. Engineered for performance-focused enthusiasts, these high-flow inlet pipes replace the restrictive factory units to significantly improve airflow, turbo response, and overall engine efficiency. Whether paired with the stock intake system or an aftermarket intake that retains the factory inlet connection size, these inlets are designed for a precise, direct-fit installation.
Each inlet features precision CNC-machined flanges crafted from high-quality billet aluminum. The internal geometry is optimized with smooth transitions to reduce turbulence before the turbochargers, allowing air to flow more efficiently. This design promotes faster turbo spool, sharper throttle response, and stronger mid- to high-RPM performance, all while maintaining OEM-level reliability and fitment.
The MAD S58 High Flow Inlets are ideal for both stock turbo vehicles and tuned setups seeking to eliminate a known airflow bottleneck on the S58 platform. They deliver measurable performance gains without compromising durability, drivability, or engine bay aesthetics.
• CNC billet aluminum flanges machined from high-quality billet material for strength, heat resistance, and smooth unrestricted airflow
• Improved airflow and turbo response through a larger internal diameter and optimized inlet design
• Direct bolt-on installation using factory mounting points and hardware locations
• Compatible with stock intake systems and aftermarket intakes that retain the factory inlet connection size
• Ideal for stock or upgraded setups, supporting increased airflow demands from tuned S58 engines
BMW G80 M3 S58
BMW G82 M4 S58
BMW G87 M2 S58
BMW F97 X3M S58 (LCI 2022+ Only)
BMW F98 X4M S58 (LCI 2022+ Only)
• CNC billet aluminum high-flow turbo inlet pipes
• Required mounting provisions for straightforward installation
The MAD High Flow Turbo Inlets deliver improved airflow, sharper response, and OEM-level fitment for S58 enthusiasts who demand performance without compromise.
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$595.00 USD
$595.00 USD
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.