OEM Replacement
Drop-In Installation
Includes 1-Year Warranty


The CSF 3843 OEM Replacement Radiator is manufactured from the highest quality components to provide you with the best aftermarket OE replacement radiator available for your 2017-2019 GM 6.6L Duramax L5P. CSF is an ISO certified cooling system manufacturer with many OEM customers around the world. CSF is also known as an industry leader in automotive cooling for both OE and the performance aftermarket.

Each CSF Radiator is built to OE specifications for a true, “Drop-in Fit” that matches the performance of your OE radiator. CSF tests every radiator design in-house with their state-of-the-art testing facility that includes wind tunnel, burst pressure testing, vibration testing, thermal cycle, and salt spray corrosion testing. When CSF identifies a weakness in either the OEM design or performance, a stronger solution is implemented for class-leading performance and durability. Individually pressure tested and serial # certified. Comes complete with a 1 year warranty.


Additional information

Weight 37 lbs
Dimensions 47 × 7 × 32 in


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