Edelbrock E-Series Cylinder Head Bolt Kit #85502 for Chevy small-block enginesEdelbrock E Series Cylinder Head Bolt Kit #85502 is a high quality replacement set of bolts with washers for small block Chevy engines equipped with Edelbrock Performer RPM aluminum heads. This bolt kit is required when installing Edelbrock aluminum heads on an engine previously equipped with cast iron heads. Bolts used with iron heads do not require the use of washers. Washers are required with aluminum heads and the bolts in this E Series kit are