The factory intercooler on the LLY Duramax limits airflow with a small core and boost tubes, which raises boost air temperature and holds back power. This upgrade replaces it with a larger core and bigger tubes for cooler, denser intake air.

Banks 25978 Techni-Cooler Construction

• 25 percent larger core area and 34 percent more volume than the factory unit.
• Mandrel-bent 3 in. boost tubes reduce restriction into and out of the core.
• Cast end tanks resist rupture under sustained high-boost conditions.
• Lowers exhaust gas temperature and supports higher continuous power.
• Direct-fit application for 2004-2005 Chevy/GMC 2500 HD/3500 6.6L Duramax LLY.