CSF Heavy Duty Intercoolers are the perfect upgrade for your 06-10 6.6L TD Silverado/Sierra HD. The Heavy-Duty Bar & Plate Construction All-Aluminum Cast End Tanks have been Pressure Tested at 120 psi for Maximum Reliability in Extreme Boost Applications. This intercooler is a true "Drop-in Fit" installation with precise OEM-Style inlet/outlet connections and requires no modifications. In addition, each cooler comes finished in CSF's Thermal Rejection Powder-Coating for greater cooling performance and a sleek OEM+ look. Thermal Rejection coatings offer up to 15% improvement in heat dissipation over non coated intercoolers.