Everything about Techni-Cooler is bigger, including the core area, which has 25 percent more flow volume. Increases air density for more continuous power. The Banks engineers carefully examined the stock Duramax intercooler, and then upgraded everything for superior results: Stock has one plastic end tank. Techni-Cooler provides two durable, all-aluminum end tanks, which will never melt or burst under high-boost conditions. Large, streamlined end tanks optimize airflow and air density. With a thicker core than stock, Banks Techni-Cooler sports a 25 percent increase in volume. Very cool! Techni-Cooler improves cooling for higher continuous power and lower exhaust gas temps. Banks denser air charge and better fuel burn provide another critical benefit: improved fuel economy. For even better airflow and faster turbos spool-up get the Boost Tube Upgrade Kit.