Allstar Performance 18" Steel Mechanical Radiator Fan — 6-Blade, 27° Pitch, 5/8" Pilot Hole

Designed for race cars and high-performance street machines, this mechanical radiator fan combines durable steel construction with an aggressive 27° blade pitch to move large volumes of air where it matters most. The fan mounts using a 5/8" pilot hole and a common bolt pattern, making it straightforward to fit many fan clutches or pulley-driven setups. It ships as a single unit and includes a 90-day limited factory warranty.

How does this fan improve cooling under heavy load?

The six blades with a steep 27° pitch are shaped to generate strong axial airflow at operating speeds typical of belt-driven mechanical fans. That focused airflow helps reject engine heat through the radiator when natural vehicle movement or electric fans aren’t sufficient.

• 27° blade pitch for increased air displacement
• Six blades for consistent, continuous airflow
• Steel construction resists flexing at high RPM
• Designed to work with clutch or pulley-driven arrangements

Will this fit my vehicle and mounting setup?

The fan uses a universal bolt pattern centered on a 5/8" pilot hole, which is compatible with many common mechanical fan clutches and mounting hubs. Measure your clutch or hub pilot diameter and compare bolt spacing to ensure proper fitment before purchase.

• 5/8" pilot hole for standard clutch/hub alignment
• Universal bolt pattern adapts to a variety of mounts
• 18" overall diameter fits many performance radiators and shrouds

What materials and durability features does it offer?

The blade and hub assembly are fabricated from quality steel for structural strength and longevity in demanding environments. Steel blades maintain shape under centrifugal and thermal stress better than thin stamped alternatives, which helps preserve airflow characteristics over time.

• Robust steel blades and hub for durability
• Precision-formed blade angles to retain pitch at speed
• Single-piece fan sold per unit for straightforward replacement

What should I expect from warranty and service?

This fan includes a 90-day limited factory warranty that covers manufacturing defects and workmanship issues within the stated period. Keep purchase documentation and inspect the fan at installation; contact the manufacturer or seller for warranty steps if a defect appears.

• 90-day limited warranty from Allstar Performance
• Sold individually — order quantity equals number of fans
• Documented proof of purchase recommended for claims

Who this fan is for: technicians, fabricators, and performance enthusiasts who need a rugged mechanical radiator fan that delivers high-volume airflow for race engines, high-output street builds, or any application where belt-driven cooling is preferred. If you require a durable 18" steel fan with a standard 5/8" pilot hole and universal bolt pattern, the Allstar Performance ALL30100 is engineered to meet those needs while simplifying installation and providing steady cooling performance.