Parameters:
1. Compatible with Chevrolet SB and BB engines, including 265, 283, 305, 327, 350, 383, 396, 400, 427, 454, 472 and 500 models
2. Overall size is 4.09 inches x 2.83 inches, the middle inner diameter is 1.81 inches, and the inner diameter of the two side rings is 0.43 inches
Fits tightly to the connection parts of the thermostat water neck, water hose and shell, effectively avoiding coolant leakage
Resistant to high and low temperatures, adaptable to different working conditions, ensuring the reliability of sealing and connection