Flex-A-Lite expanded their line of direct-fit Flex-A-Fit aluminum radiators to include engine-swap aluminum radiators. These radiators are designed to accommodate the popular 5.0L engine swaps (based on the 1986-93 5.0L) into 1964-69 Mustang. The original Flex-A-Fit radiator for this application positioned both the inlet and outlet on the passenger side, just like the original. However, because the 5.0L swap is popular in these Mustangs, this requires the outlet to be on the driver's side. These radiators are available with or without the Flex-A-Lite 3,000 cfm electric fan (#400-160) mounted directly from the factory.

Flex-A-Fit radiators are manufactired in the U.S. with a 2-row, all-aluminum core hand welded to the side tanks with patented "T" channels to dissipate heat more efficiently. Radiator mounting brackets are included for direct bolt-in fit to the stock location, and the "T" channels provide a more secure attachment for these mounting brackets.