Review on Enhanced Performance: Mr. Gasket 2470R ThermoCap - Red (13 PSI) for Domestic Vehicles by Corey Nyuon

Excellent product. My old radiator cap didn't fit after replacing the radiator on my truck. So I got these. It's within 10F of my temp sensor, which is to be expected since the temp sensor is on the engine and that's on the radar. This helps me keep track of the radiant temp when it's over 90 outside and I'm running on AC. The reason is my truck never had air conditioning and I added it which means it can feel overheated, the cooling system is not designed for air conditioning. Just a handy little thing when you need it. Getting a few more for my other vehicles.