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PAC-1228-16 PART NUMBER
PAC 1200 Series Drag Race Valve Springs PAC-1228$418.03Dual Spring, 1.6250" Outer Diameter, 1.175" ID of outer spring, 0.788" ID of inner spring, Seat Pressure 280 @ 2.100, Open Pressure 847 @ 1.150, Coil Bind 1.100", Set of 16 Springs
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PAC-1373-16 PART NUMBER
PAC Circle Track Dual Valve Springs PAC-1373$640.39Dual Spring, 1.430" Outer Diameter, 1.002 ID outer, .688" Inner Diameter, Seat Pressure 250 @ 2.100, Open Pressure 855 @ 1.200, Coil Bind 1.152", Set of 16 Springs
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