AFCO's NEW C7 Z06 Corvette heat exchanger [in black] is an all-aluminum, double pass design that lowers coolant temperature by 20° F. It is a direct fit heat exchanger and it installs in approximately 3-5 hours. There is no drilling, cutting, or fabrication required. Dual row 1.00 core vs. single row 1.38 on OEM unit. Double pass design for maximum temperature drop. Black "Thermal Coating" finish lowers temperature by 25 degrees. All aluminum TIG-welded construction. Installation time approximately 3-5 hours. All hardware and detailed installation instructions included.