

High Performance LS Polylock
Made In USA. Melling GM LS rocker arm adjusting nuts are high performance polylocks designed for full roller rocker arms. Made from heat-treated premium-grade 4140 Chromoly steel these adjusters provide 190 000 psi tensile strength for the utmost in reliability. Precision CNC-machined threads to ensure optimum seat pressure flush-machined set screws for proper contact on the studs and best of all they don't require any special tools for installation.
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