- 15-inch overall diameter provides targeted airflow across radiator cores
- Flexible steel blades flatten at high rpm to minimize horsepower loss
- Maximum low-speed airflow prevents engine overheating during idle
- Slotted multi-fit mounting pattern fits most standard water pump hubs
- Sturdy steel construction ensures long service life under high heat
Designed to deliver efficient engine cooling across varying RPM ranges, the Cal Custom 15-inch mechanical steel flex fan is engineered with flexible steel blades that flatten out at high engine speeds. It reduces parasitic horsepower drag and engine noise while pulling air at idling speeds. Featuring a multi-fit slotted center hub, it bolts directly to standard V8 water pump flanges, offering a reliable cooling solution for classic muscle cars.