Steel Fan 18in 4 Blade

The ALLSTAR PERFORMANCE Steel Fan 18in 4 Blade is a mechanical cooling fan engineered for universal engine applications requiring dependable thermal management. Built with heavy-duty steel construction and finished in durable black paint, this 18-inch fan delivers consistent airflow for both street and performance builds where reliable engine cooling is non-negotiable. The 5/8-inch pilot bore and universal bolt pattern ensure straightforward installation across a wide range of engine platforms.

Mechanical fans operate independently of engine speed, providing immediate cooling at idle and under load—a critical advantage in high-heat environments where electric fans may lag behind demand. The four-blade design optimizes air displacement while maintaining structural integrity under the vibration and stress of continuous operation. At 3.9 lbs, this fan strikes a practical balance between material thickness and rotational weight, reducing parasitic drag on the engine while retaining the mass needed for consistent performance in sustained cooling cycles.

This steel fan assembly suits engine builders, restoration shops, and operators maintaining older vehicles or performance platforms where traditional mechanical cooling systems remain the standard. The universal bolt pattern accommodates most shroud and radiator configurations, making it a practical solution for hot rod builds, classic car restorations, and work vehicles where proven, low-maintenance thermal management is valued. Steel construction resists warping under prolonged high-temperature exposure better than lighter alternatives, supporting consistent performance across extended operation.

SKU ALL 30105 identifies this as an ALLSTAR PERFORMANCE OEM-spec replacement or upgrade component, recognized for fitment accuracy across multiple engine families. The 18-inch diameter and four-blade configuration represent the mid-range cooling capacity—sufficient for moderate to high-displacement engines without excessive fan noise or parasitic loss common in oversized designs.

Verify shroud clearance and belt routing before installation to ensure proper blade spacing and bearing support.