AFCO double pass GM style racing radiator 26" W x 19" T w/-20 AN female inlet offers great fit and performance, along with an optimized fin count ratio for maximum cooling efficiency. ALL AFCO radiators offer a furnace brazed sealed core without the use of epoxy, and are all 100% tested before shipping. AFCO Double Pass provide more cooling over standard type radiators, with less than 2 oz. of added weight. Common temperature drops are 10-20 degrees when replacing a standard configuration radiator of equal core size. Keeps your mind off the water temp and puts it onto the race track. Double pass radiators gain their efficiency by first passing the fluid over the top half of the radiator and then the bottom half, giving the radiator the ability to dissipate heat twice. AFCO uses an exclusive 360 degree TIG-welded baffle that splits the radiator core into two sections. This 360 degree baffle effectively creates two radiators out of one and assures that you won't have any coolant that has entered the radiator but never made it across the core. This is superior to utilizing silicone to seal internal baffles, or worse, a partial weld that allows the coolant to bypass the radiator core completely. 360 Degree Welded - Internal baffle ensures no "short cuts" past the baffle due to internal leaks. Installation Instructions included.