From Ron Davis Racing, these two 12" Derale fans (1576 cfm each!) are fitted in pusher fashion on the front of the a/c condenser.  They connect to a relay on the under-hood PDU which is controlled by either the SMC, and/or fan control switch and timer located in the new primary control box. The fans are 3.37" thick at the center and required adjusting brackets for engine oil, power steering, and transmission coolers to allow ample clearance.