The Speedmaster PCE255.1008 is a complete set of 7/16" Polylock Rocker Arm Nuts designed to work with Big Block Chevy 454 stud girdle applications. Polylock-style nuts provide a reliable, positive locking method that helps maintain precise rocker arm geometry and valve lash settings under demanding engine operating conditions.
These nuts are purpose-built for use with stud girdle setups on BBC 454 engines, making them a straightforward replacement or upgrade component for your valvetrain assembly. Whether you are refreshing an existing build or setting up a performance engine, the Speedmaster PCE255.1008 polylock nut set delivers a secure, consistent fit for your rocker arm studs.
MPNPCE255.1008
UPC840136522560
