IAG Performance Wiggins Style Thermostat HousingNote: 24 Wiggins Clamp NOT included ULTIMATE PERFORMANCE FOR RACE APPLICATIONS When building a Subaru race car one often overlooked component is the thermostat housing. The OEM housing can restrict coolant flow, which is a big problem when seeking maximum performance. The standard thermostat housing uses rubber hoses and standard worm drive clamps. While this works OK on a street car, it's not the most reliable connection and requires tools for