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Review on πŸ”§ Dorman Pressurized Coolant Reservoir 603-449 - Optimize Your Engine Performance by John Bones

Revainrating 3 out of 5

Keep the old cap for a while so you know you don't have any defects.

I gave an average rating because I believe our product was defective. The container fitted perfectly, but the lid fell off the day after the car trip. I tried to screw the cap back on, but it won't screw back on. I had to use my old cap.

Pros
  • Robust design backed by 100 years of aftermarket experience
Cons
  • Poorly thought out