Product Details Manufacturer: Mr Gasket Brand: Mr. Gasket Model: Mr. Gasket - 4363 High Performance/High Flow Thermostat Gm-160 Item Weight: 1.41 ounces Product Dimensions: 6.5 x 4.3 x 1.6 inches Item model number: 4363 Is Discontinued By Manufacturer: No Exterior: Machined Manufacturer Part Number: 4363 OEM Part Number: 4363 Date First Available: November 23, 2005 Key Features ✅ Opens at 160 Degrees ✅ Designed to Resist Large Variations of Coolant Pressure at High RPM ✅ Fully opens at Correct Temperature Consistently Regardless of engine RPM ✅ For High Performance Street, Drag Race, and Oval Track ✅ Copper & Brass Construction - Resists Corrosion Product Description Mr. Gasket 4363 High Performance/High Flow Thermostat - 160 Degrees GM, Ford, Amc