4 Stage .875 inch Pressure Section Dry Sump Oil Pump has an oil pump and a dry sump pump. It has a 4 stage w 1.100 scavenge and a .875 p. sect. It has a Chevrolet driver's side mounting bracket. It has a 12AN fitting (in) and -12an fitting (out). It has a 16AN out at the front of the pump.