PAC Racing 1300 Series Dual Valve Spring - 780 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16 PAC-1330 6600BK Please see accompanying drawing for

Please see accompanying drawing for offset applications

They all feature a rolled edge outlet profile and are available in a variety of inlet and outlet sizes

Use to connect Holley PN 558-312 or factory GM LSx coil harnesses to Holley HP or Dominator ECU's

All mounting hardware included

Slabbed Teflon(R) coated throttle shafts are assembled with Teflon(R) ribbon bearings

PAC Racing 1300 Series Dual Valve Spring - 780 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16 PAC-1330 6600BK Please see accompanying drawing forProduct Description: Valve Spring 1300 Series Dual Spring 780 lb in Spring Rate 1. 130 in Coil Bind 1. 500 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 various