PAC Racing RPM Series Valve Spring Beehive Spring 340 lb/in Spring Rate 1.100" Coil Bind - 1.207" OD 4904 offset -21 and the hub

offset -21 and the hub bore is 78

These cylinder heads feature a 65cc or 75cc combustion chamber with a 64cc exhaust port and a 3/4'' thick head deck (ideal for nitrous or blower applications)

Water Pump Spacers are CNC machined from 6061-T6 Billet Aluminum

Great for both stock and performance trucks

PAC Racing RPM Series Valve Spring Beehive Spring 340 lb/in Spring Rate 1.100" Coil Bind - 1.207" OD 4904 offset -21 and the hubProduct Description: Valve Spring RPM Series Beehive Spring 340 lb in Spring Rate 1. 100 in Coil Bind 1. 307 in OD 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 services at