Thermostat housings are not all the same size, and the larger 2.48 in. body is what a lot of big bore housings want. Beyond fit, this one is built to hold its 180 degree calibration when coolant pressure rises, and the copper and brass construction keeps corrosion from seizing the valve.

Mr. Gasket 4367 High Performance Thermostat Features:

• Opens at 180 degrees.
• 2.48 in. diameter.
• Designed to resist large variations of coolant pressure at high rpm.
• Opens at the correct temperature consistently regardless of engine rpm.
• Copper and brass construction resists corrosion.
• High flow design.
• For high performance street, drag race and oval track use.
• 1979-1989 318 and 360 engines use Mr. Gasket 4364.