CSF 3664 Radiator

OE-Style Auxiliary Radiator for Ram HD

CSF 3664 is an OE-style auxiliary radiator built with a plastic tank and aluminum core layout for Ram heavy-duty cooling systems. It is designed for 2013-2018 Ram 2500 and 2013-2018 Ram 3500 applications, with fitment matched to the factory-style cross flow configuration.

Key Features

• OE-style plastic tank and aluminum core construction
• Cross flow radiator design
• 1-row core layout
• Core thickness: 7/8 in.
• Core dimensions: 25 9/16 in. length x 15 7/8 in. width
• Inlet: 1 3/8 in. left
• Outlet: 1 3/8 in. right
• No cap included
• CSF part number 3664

Detailed Description

CSF 3664 is engineered as a direct-fit auxiliary radiator for Ram 2500 and Ram 3500 trucks from 2013 through 2018. The radiator uses an aluminum core with plastic tanks in an OEM-style layout, matching the factory cross flow configuration and hose orientation for left-side inlet and right-side outlet routing. This design supports consistent coolant flow and helps maintain proper operating temperatures in demanding truck applications. CSF 3664 also cross-references BBB Industries 13492 and interchange numbers 52014721AB and CH3010373 for the same application.

CSF manufactures radiators to high-performance standards and validates cooling performance through laboratory wind tunnel testing. The brand has supplied radiators worldwide for decades and produces a broad range of OE-style cooling components for many vehicle platforms. For buyers searching for a Ram 2500 radiator, Ram 3500 auxiliary radiator, or CSF 3664 replacement radiator, this unit matches the factory-style configuration used on the listed trucks.

What This Radiator Helps Address

• Overheating caused by a damaged or restricted auxiliary radiator
• Coolant leaks from cracked plastic tanks or aged seals
• Reduced cooling efficiency from a clogged or corroded core
• Temperature instability under towing or heavy-duty use
• Fitment issues when replacing an OE-style Ram HD auxiliary radiator

Installation Notes and Tips

• Fits 2013-2018 Ram 2500, N/A, OE Style Design; Auxiliary Radiator; 1 Row Plastic Tank Aluminum Core.
• Fits 2013-2018 Ram 3500, N/A, OE Style Design; Auxiliary Radiator; 1 Row Plastic Tank Aluminum Core.
• Verify inlet and outlet orientation before installation: 1 3/8 in. left inlet and 1 3/8 in. right outlet.
• Confirm the vehicle uses the OE-style auxiliary radiator layout before ordering.
• Inspect hoses, clamps, and surrounding cooling components during replacement.

Quality Assurance

CSF builds this radiator to OEM-style specifications using an aluminum core and plastic tank construction. The product is backed by CSF’s long-running radiator manufacturing experience and performance validation process used across its cooling line.