Edelbrock 16- Retainers Perf RPM 440 60189 60929 HeadsThe Edelbrock #9644 retainers are designed to be used with springs featuring 1. 55" O. D. and 1. 125 I. D. Theses retainers require 11 32" Valve Stems with 7 degree locks. Works with #5792 Valve Springs. Set of 16 Warranty Installation Instructions
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