Dual diaphragm making this setup much better for increased safety on your vehicle. The booster mounts with a4-bolt pattern. The 4 bolts are in a perfect square and are3/8" apart (center to center).
For Chevy GM SBC Heavy Duty Universal 31" x 19" 3 Row Aluminum Cooling Radiator
ENGINKUHLER Universal 28"X19" 3 Core Aluminum Radiator Compatible for Chevy GM SBC BBC Engine Cooling Radiators High Performance (3 Row)
28" X 19" 4 Row Aluminum Radiator&Shroud Fan for Chevy GM SBC BBC Universal
Cubauto 31"x19" Universal 3-Row Radiator Shroud+Fan For Chevy GM SBC HeavyDuty Aluminum Radiador Radiators
3 Row Universal 22'' Wide Radiator Replacement for Chevy GM SBC BBC Cooling Aluminum Radiators with Electric Cooling Fan Crossflow 22''X19''
22''W x 19''H Aluminum 3 Row Radiator For Chevy GM SBC BBC Universal
