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.
Specifications:
| Description_ABR |
HeadBlotKit |
| Description_ASM |
Chevrolet:W-Series:348 (5.7L)-409 (6.7L) |
| Description_DEF |
Engine Cylinder Head Bolt Set |
| Description_EXT |
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. |
| Description_LAB |
409 Chevy Head Bolt Kit |
| Description_MKT |
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. |
| Description_INV |
409 Chevy Head Bolt Kit |
| Description_TRA |
The Edelbrock #8581 is made specifically for Chevy W engines 409 |
| Description_TRA |
Installation is the same as for original equipment cylinder heads. Consult service manual for specific procedures, if necessary. |
| Description_TRA |
Be sure that the surface of the block and the surface of the head are thoroughly cleaned to remove any oily film before installation. |
| Description_TRA |
Use alcohol or lacquer thinner on a lint-free rag to clean. Apply Teflon pipe sealant or suitable sealer to head bolt threads. |
| Description_TRA |
Apply 30W oil or suitable lubricant under side of bolt heads and washers. Torque to 65 ft./lbs. in three steps (40, 55, 65) following the factory tightening sequence A re-torque is recommended after initial start-up and cool-down (allow 2-3 hours for adequate cooling) |
| Quantity |
Kit |
| Length |
(16) 3.45 in, (20) 4.18 |
| Finish |
Black Oxide |
| Head Drive Type |
Hex |
| Material |
Chromoly |
| Minimum Length |
3.45 |
| Thread Type |
Coarse |
| Grade Type |
Performance |
| Thread Diameter |
0.4375 |
| RGL |
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. |
| Washers Included |
Yes |
| Length |
2.0000 |
| Width |
5.0000 |
| Height |
9.0000 |
| Weight |
5.0000 |
