PAC Racing RPM Series Valve Spring Dual Spring 600 lb/in Spring Rate 0.985" Coil Bind - 1.274" OD 13-RS1-B-4XS These cylinder heads feature an

These cylinder heads feature an extra thick deck and extra material in the spring pockets for a heavy-duty casting that can be used with high-lift cam and heavy spring combinations

This SBC pro louvered windage tray is a direct replacement for our screen trays in our small block Chevy power series circle track pans

Fits AFCO GM Metric #AFC9850-6500 Hub Brake Rotor

Low velocity impact: Helmet impact at 6m/s

PAC Racing RPM Series Valve Spring Dual Spring 600 lb/in Spring Rate 0.985" Coil Bind - 1.274" OD 13-RS1-B-4XS These cylinder heads feature anProduct Description: Valve Spring RPM Series Dual Spring 600 lb in Spring Rate 0. 985 in Coil Bind 1. 274 in OD GM LS Series Set of 16 PAC Racing Springs is part of the Race Winning Brands Family. With more than 100 years of spring manufacturing experience. We understand the demands of racing and provide a commitment to all of our customers to provide the best service possible. We continue to expand products and offer expanded onsite technical