The Edelbrock #5812 Sure Seat Valve Spring for Oldsmobile 330-403 V8 1967-1984 O.E Cast iron cylinder heads are made of highest quality spring wire and precision wound to close tolerances, our Sure Seat Valve Spring sets are for use on original equipment heads when installing Edelbrock Performer-Plus, Performer RPM and Torker-Plus camshafts. These are the same high-performance'springs used on Edelbrock Performer and RPM cylinder heads. For camshaft warranty compliance, use only the springs recommended by Edelbrock for each camshaft application.
| Camshaft Type | Mechanical |
| Coil Bind Height | OEM |
| Inside Diameter | 1.041 in. |
| Installed Height | 1.670 in. |
| Installed Pressure | 80 lbs. |
| Open Height | 1.670 in. |
| Outside Diameter | 1.435 in. |
| Position | Exhaust or Intake |
| Spring Rate (lbs./in.) | N/A |
| Spring Type | Single |
| Tubing Length | 185 |
| WARNING CA Proposition 65 | Yes |
| WARNING CA Proposition 65 Message | WARNING: This product can expose you to Chromium; which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information; visit www.P65warnings.ca.gov. |
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