With a 1.254" outer diameter and a recommended installed height of 1.700", these springs are ideal for use in Chevrolet Small Blocks with factory, unmodified cylinder heads. These springs have a 105 pound seat pressure, max lift of 0.490" and a spring rate of 373 pounds, making them ideal for mild flat tappet camshafts. 981 springs are compatible with our 750-16 retainers and 4753 shims.
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- Seat pressure: 105 lbs. @ 1.700 inch, Open Pressure: 273 lbs. @ 1.250 inch
- O.D.: 1.254 inch, I.D.: .880 inch
- Single valve springs with damper
- Approximately .490 inch max lift at recommended installed height
