2.5 Inch Intercooler piping kit 9pcs Free U Pipe Black Powder Coated 2.0mm Thickness Aluminum Pipe, Mandrel Bent, Black Powder Coated. Each Pipe is 18" in Length,Outer Diameter is 2.5".Each pipe is bead, or rolled of each end(Except J Pipes). Top Quality Silicon Hoses,inside Diameter is 2.5". Matching Top Quality Stainless Steel 2.5" T-BOLT Clamps.