Radiator Caps

High-pressure radiator caps help to ensure against overheating. Raising your coolant pressure will raise the coolant boiling point (1 psi adds approximately 2°F to the boiling point, depending on your coolant mixture). Before installing a high-pressure cap, have your cooling system inspected and pressure checked to make sure that it can handle the increased pressure.

The bayonnet-style radiator caps listed below all fit any standard "SAE A Size" neck (2 1/8" | 54mm OD, 1 5/8" | 41mm ID, 3/4" | 19mm depth), including the Canton weld-on radiator neck.