The CSF heavy-duty radiator upgrades the 2020-2024 Chevy Silverado and GMC Sierra 2500/3500 HD 6.6L Duramax with a 2-row 42mm aluminum core that runs about 20% thicker than the factory 1-row 35mm unit. The crossflow design integrates both an engine oil cooler and a transmission oil cooler, and high-performance multi-louvered fins with EPDM gaskets improve cooling and durability under heavy load and towing.
Specifications
| Type | Heavy-duty radiator (plastic tank / aluminum core) |
| Material | Plastic tanks, aluminum core |
| Core | 2-row 42mm, ~20% thicker than factory 1-row 35mm |
| Oil Cooler | Integrated engine oil cooler |
| Transmission Cooler | Integrated transmission oil cooler |
| Fins | High-performance multi-louvered |
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