Frostbite Direct Fit Fan Shroud (2 x 12 openings) - for FB162, FB163, FB164, FB302 radiators. Frostbite Performance Cooling Products is pleased to announce the release of direct fit Aluminum fan shrouds to fit our very popular 2, 3, and 4-row aluminum radiators. These are the same fan shrouds used in our popular electric fan/shroud packages, but offer the flexibility of the end consumer to mount the electric fan of their choice.