Direct-Fit Aluminum Radiator w/ SPAL Brushless Fan

The DeWitts 32-5239070M is a high-performance cooling solution designed for 1969-1972 Chevrolet Corvettes, specifically small block models with manual transmissions. This direct-fit Pro-Series aluminum radiator boasts a single-pass, crossflow design, incorporating two rows of 1.00" cooling tubes to deliver a 25% increase in cooling performance compared to factory radiators. It includes an exclusive 500-watt SPAL brushless fan, integrated with an aero-inspired injection-molded shroud, to create the most powerful cooling combination available. The advanced SPAL brushless fan technology features high energy ferrite magnets and a state-of-the-art sine wave sensorless drive, achieving over 82% electrical efficiency for high air-side performance with minimal electrical load. These motors are fully sealed to IP68 and IP6K9K compliance, ensuring durability in various conditions. The radiator itself is constructed from aluminum, with a core width of 26.00", a core height of 18.5”, and a core thickness of 2.25". The inlet is located on the upper driver side, and the outlet on the lower passenger side. It is important to note that SPAL's brushless fans cannot be activated with a traditional relay/switch setup. They require a negative PWM signal. If your fan controller or ECM cannot provide this, DeWitts recommends using their specific wiring and temperature-activated smart sensor (#32-SBL-TS-205P). The radiator does not include a cap. This specific model, 32-5239070M, is the black finish version for manual transmission Corvettes. Application notes indicate this radiator fits 1969-72 small block Corvettes equipped with factory options like automatic transmission, air conditioning, or special engine options (LT1, L46), while base cars without options used a smaller radiator with a separate surge tank.