Profile: Stant Mfg., Inc. produces automotive parts. Our products include gas/fuel caps, radiator caps, oil filler caps, cooling system tester, fuel cap testers, fuel system tester and vacuum tester. Our SuperStatA® premium thermostats use a unique non-linear valve to stabilize engine temperatures. We offer a wide variety of radiator cap styles and applications for import cars, light trucks, HD trucks, racing & off-road. Our brands include Lev-R-Ventâ,¢ and Pre-Ventâ,¢.