The Lower Pipes are 2 1/4in dia. mandrel bent steel tubing except for the compressor outlet elbow which is 22in at the compressor. These fit the Super Big Side mount and dejontool side mount IC, It will not fit the stock side mount IC. Includes all stainless steel hose clamps & couplings. Choose 2 1/4in or 2 1/2in end to fit IC inlet. Fits: 20g, Garrett and Other Down Flow Turboss Part Number: LIP-1gD