The aFe Power 3-1/2 intercooler tube represents the next generation of Diesel performance products. This intercooler tube transitions from a 3-1/2 diameter to 3 to fit the factory intercooler for an improved response. This kit comes complete with a 3.5 mandrel bent powder-coated stainless steel tube and 4-ply heavy duty silicone couplings and constant tension T-bolt clamps to ensure maximum performance and a secured fit.