66784 Stud Mount Valve Spring Compressor Remove Install Valve Spring for 3/8" Fitment: For all 3/8" & 7/16" Rocker Studs. Specially designed for compressing valve springs with the cylinder head on block Features: COMPATIBILITY: For all 3/8" & 7/16" Rocker Studs. Specially designed for compressing valve springs with the cylinder head on block. FUNCTION: Easily and quickly remove valve spring from an assembled engine for checking or replacing. .
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