Review on 🔧 ProForm 66835: Maximize Engine Performance with Mini Valve Spring Tester by Justin Butler
Great for the home player
I tested this with my own weight and a set of new springs. It seems to be between 100 and 200 pounds within 5 pounds. I clamped it in a vise on my grinder and used an old jack with a 3/4" collet to push the spring down. The QI scale on the spring and stopper makes the whole setup as good as a professional spring tester .
- Mount Type: Vehicle specific
- Almost never
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