CSF Mercedes AMG M157 / M278 / M133 High-Performance Auxiliary Radiator

The CSF Mercedes AMG M157 / M278 / M133 High-Performance Auxiliary Radiator is engineered to deliver superior thermal management for a range of Mercedes-Benz AMG models. Designed as a critical component within the vehicle’s cooling system, this auxiliary radiator enhances overall heat dissipation, ensuring optimal engine and intake air temperatures under demanding conditions. By effectively reducing engine water temperatures and serving as the heat exchange medium for the air-to-water charge-air coolers in turbocharged systems, it plays a vital role in maintaining peak performance and reliability. Constructed from 100% all-aluminum with advanced TIG welding techniques, this auxiliary radiator offers exceptional durability and resistance to corrosion. Its robust design includes a 2-row, 68mm high-performance core featuring CSF’s exclusive B-Tube technology, which significantly surpasses the OEM 1-row, 42mm core in cooling capacity. The ultra-efficient 6.5mm tall multi-louvered fins maximize surface area contact, enhancing heat transfer efficiency and contributing to a prolonged heat soak threshold. This ensures that the engine operates within optimal temperature ranges even during intense driving scenarios. Unlike OEM auxiliary radiators, which typically provide minimal protection against environmental factors, the CSF auxiliary radiator includes a detachable rock guard. This feature guards against debris accumulation and potential core punctures, thereby extending the radiator’s service life and maintaining consistent cooling performance. To achieve balanced cooling across both sides of the vehicle, CSF recommends purchasing two units for models equipped with dual auxiliary radiators from the factory. For comprehensive cooling optimization, installation in conjunction with the CSF Front Mount Heat Exchanger (part number 8197) is advised. Features 2-Row 68mm High-Performance Core with CSF’s Exclusive B-Tube Technology, offering the industry’s highest capacity compared to the OEM 1-row 42mm core Ultra-efficient 6.5mm tall multi-louvered fins designed for maximum surface area contact and superior heat dissipation 100% All-Aluminum TIG-welded construction for enhanced strength, durability, and corrosion resistance Individually leak and pressure tested to ensure reliability and optimal performance CNC machined mounting brackets and OEM-style “quick connect” inlet/outlet fittings for precise fitment and ease of installation 1-hour “mirror finish” hand polish for a premium appearance and smooth surface finish Detachable rock guard included to protect against debris and prevent core damage Multi-fit design compatible with both left and right sides of the vehicle (sold individually) True “drop-in fit” requiring no modifications for installation, preserving factory integrity Applications Year Range Make Chassis Code Model Trim Engine / Trans / Etc Notes 2014-2019 Mercedes-Benz C117 CLA45 AMG – Turbocharged 2L L4 Only Requires 1 Aux Radiator 2012-2014 Mercedes-Benz C218 CLS63 AMG – Turbocharged 5.5L V8 Fits Both Left & Right Side 2014-2018 Mercedes-Benz C218 CLS63 AMG S – Turbocharged 5.5L V8 Fits Both Left & Right Side 2012-2013 Mercedes-Benz W212 E550 – Turbocharged 4.7L V8 Fits Both Left & Right Side 2012-2015 Mercedes-Benz W212 E63 AMG – Turbocharged 5.5L V8 Fits Both Left & Right Side 2014-2016 Mercedes-Benz W212 E63 AMG S – Turbocharged 5.5L V8 Fits Both Left & Right Side 2013-2018 Mercedes-Benz W463 G63 AMG – Turbocharged 5.5L V8 Fits Both Left & Right Side 2016-2018 Mercedes-Benz W463 G65 AMG – Turbocharged 6L V12 Fits Both Left & Right Side 2013-2016 Mercedes-Benz X166 GL63 AMG – Turbocharged 5.5L V8 Fits Both Left & Right Side