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

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.