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PAC-1312 PART NUMBERPAC 1300 Series Drag Race Valve Springs PAC-1312$588.00
Dual Spring, 1.106" Outer Diameter, 0.810" ID of outer spring, 0.574" ID of inner spring, Seat Pressure 150 @ 1.700, Open Pressure 403 @ 1.000, Coil Bind 0.850", Set of 16 Springs
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PAC-1312L PART NUMBERPAC 1300 Series Drag Race Valve Springs PAC-1312L$588.00
Dual Spring, 1.106" Outer Diameter, 0.810" ID of outer spring, 0.574" ID of inner spring, Seat Pressure 110 @ 1.550, Open Pressure 330 @ 1.000, Coil Bind 0.850", Set of 16 Springs
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