PAC Springs 1243 1.550 Dual Valve Springs (16) February 29, 2024 Comments Off Posted in: springs Valve Spring – 1200 Series – Dual Spring – 550 lb/in Spring Rate – 1.150 in Coil Bind – 1.550 in OD – Circle Track Endurance – Set of 16. Share Tags: dual, springs, valve Comments are closed.