• Thermostat riser with the -16 AN bung welded to it for a clean one-piece option when running a AN upper radiator hose and the remote lines to the rear of the intake to prevent vapor pockets.
• The riser is made from 1'' aluminum and has 2 ports taped with 1/4'' NPT thread.
• Bottom is flat and will use stand gaskets.
• Will fit any small block Chevy.
• Does not come with hardware, gaskets, fittings or plugs.