Auto Pro USA Reproduction Fan Clutch designed for 1971-1974 GM vehicles equipped with Big Block Schwitzer engines featuring the 454 cubic inch displacement.
Direct replacement for GM OEM part number 3991430, ensuring precise fitment and compatibility for hassle-free installation.
Engineered to meet or exceed original equipment manufacturer standards for reliable performance.
Flat Rectangular Bi-Metallic Thermostatic Element
New Design Seals for Greater Leak Resistance
Modern Ball Bearing to Limit Wobble and Smooth Operation
Auto Pro USA's commitment to quality ensures a dependable and long-lasting replacement part.
