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Review on πŸ”§ Improved Motorcraft RT1139 Thermostat for Enhanced Engine Performance by Roy Boone

Revainrating 5 out of 5

As others have said, place the Motorcraft parts in your .

As others have said, install Motorcraft parts in your Ford and you will have fewer problems. In my case I had a subtle cooling problem about 5 years/15k ago and bought a new thermostat from a local shop. It wasn't Motorcraft and guess what I had to replace again this week?

Pros
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