PAC Racing 1200 Series Valve Spring Dual Spring 644 lb/in Spring Rate 1.150" Coil Bind - 1.550" OD Leak Down Tester Engine and Performance Recommendations for

Engine and Performance Recommendations for this cylinder head: Ultimate 23" Head

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Circle Track Officials can choose regulated parameters such as max RPM rev limit

PAC Racing 1200 Series Valve Spring Dual Spring 644 lb/in Spring Rate 1.150" Coil Bind - 1.550" OD Leak Down Tester Engine and Performance Recommendations forProduct Description: Valve Spring 1200 Series Dual Spring 644 lb in Spring Rate 1. 150 in Coil Bind 1. 550 in OD Drag Race 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