i used a griffin dual 1 inch core ...... from summitracing was 169.95

if im not mistaken summitracing has the same radiators that are summit brand and are cheaper right now .....

143.95 on sale right now
Summit SUM-380331 - SummitŪ Aluminum Racing Radiators

im using the griffin version of the same setup 31x19 dual 1 in core