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 removal.
The IAG "Wiggins" Style Subaru Thermostat housing is designed to replace the OEM housing with specialized fitting called a "wiggins" clamp. This connection allows flexibility while making installation and removal easy without the need for any tools. The housing also outflows the restrictive OEM unit. Custom fabrication required for lower radiator hose assembly. (-24 Wiggins style clamp NOT included)
