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Review on Enhanced Performance ACDelco Professional 12T121D Engine Coolant Thermostat (with Gasket) - Optimal 187 Degree Control by Dave Rasic

Revainrating 1 out of 5

Factory parts at a bargain price

There's nothing quite like genuine parts. The aftermarket thermostat made my truck's temperature erratic. I'm a little excited. A little over half on the meter. This factorial thermostat sits right at 180 degrees and keeps the temperature below half the mark on the gauge.

Pros
  • Great for me
Cons
  • Clarity