aFe Bladerunner Intercoolers Tube Out 02-04 GM Diesel Trucks V8 6.6L (td) LB7The aFe Bladerunner intercooler tubes produce 20 hp and 63 lbs. ft torque and outflow the factory tubes by 45 percent. With the increased flow of this intercooler tube it will reduce you exhaust gas temperatures by 100 deg.. This Part Fits: Year Make Model Submodel 2001 2004 Chevrolet Silverado 2500 HD Base 2001 2004 Chevrolet Silverado 2500 HD LS 2001 2004 Chevrolet Silverado 2500 HD LT 2004 Chevrolet Silverado 2500 HD WT 2001 2004 Chevrolet