Stepped core design for maximum surface area contact and internal intake air-flow volume. Largest drop-in fit intercooler available in the industry. Designed with 3D scanning / rapid prototype technology to ensure precise fitment and maximum surface area utilization. Lab tested on CSF in-house wind tunnel. Rounded front face bar/plate design for optimized airflow through the core.* Drop-in fit design for an easy & quick plug-and-play installation. Complete with OEM style Quick-Connect inlet/outlet connections. Fully reversible back to OEM spec with no modifications needed. Available in silver (#CBN55-2001) and matte black (#CBN55-2001B) Lifetime warranty. Fits the following applications. BMW F30, F32, F22, F87 M235i, M2, 328i, 428i, 335i, 435i, N55 intercooler ~40 *F drop in temperatures when compared to the OEM intercooler after multiple repeated runs. Power increase of 15-20 hp on stock cars, 25 hp on modified vehicles. OEM# 17517600531 / 17517600530 CSF Part Number: 8115 & 8115B