Powerhouse Products adjustable on-head valve spring testers are a great way to check your spring pressure on an assembled engine. Made of high-quality billet aluminum, the tools are designed to fit onto your rocker arms for quick pressure checks. These valve spring testers are adjustable to work with almost any length rocker arm and are capable of measuring pressure up to 600 lbs.
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Adjustable On Head Valve Spring Pressure Tester
EDELBROCK