SKU: SKU: EDE8581
The Edelbrock #8581 bolt kit contain a complete set of the highest quality head bolts and hardened washers available. Cold-formed to ensure molecular integrity and heat treated prior to thread rolling and machining. Reduced diameter bolt heads eliminate the need for valve train removal to facilitate cylinder head re-torqueing. Hardened and parallel-ground washers are included. Rated at 170,000 p.s.i.
Edelbrock #8581 is a Head Bolt Kit for 1958-65 Big-Block Chevrolet 348/409 "W" Engines with Edelbrock 60809. 60815, & 60819 Performer RPM Cylinder Heads. This kit contains a complete set of Head Bolts & Washers for a pair of heads.
| Thread Type | Coarse |
| Quantity | Kit |
| Thread Diameter | 0.4375 IN |
| Material | Chromoly |
| Washers Included | Yes |
| Length | (16) 3.45 in, (20) 4.18 IN |
| Minimum Length | 3.45 IN |
| Head Drive Type | Hex |
| Finish | Black Oxide |
| Grade Type | Performance |
California Prop 65 Warning: 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.