SBC Head Bolt Kit

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Edelbrock #8550 Head Bolt Kit is for 1958-86 302-400 S/B Chevy Engines with Edelbrock #60619, 60639, 60659, 60697, 60715, 60719, 60735, 60739, 60759, 60849, 60859, 60869, 60879, 60887, 60889, 60895, 60899, 60909, 60949, 60995, 60999 Heads.
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The Edelbrock #8550 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.


Manufacturer Edelbrock
Application Application Specific
UPC 00085347085507
Quantity Kit
Thread Type Coarse
Thread Diameter 0.4375 in
Minimum Length 3.776 in
Color Black Oxide
Availability Note Available to Order
Warranty 12 Months
Hazardous Materials 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
Installation Notes
  • The Edelbrock #8550 is made specifically for small block Chevy V8.; Installation is the same as for original equipment cylinder heads. Consult service manual for specific procedures, if necessary.; Use Edelbrock head gasket #7310. #7310 has a flattened steel O-ring around each bore and will provide an excellent, long lasting seal. However, it will compress the aluminum and you must use #7310 for subsequent gasket changes to get a good seal.; Be sure that the surface of the block and the surface of the head is thoroughly cleaned to remove any oily film before installation.; Use alcohol or lacquer thinner on a lint-free rag to clean. Apply RTV silicone or ARP thread sealer to head bolt threads, and apply engine oil or ARP lubricant to the head bolt washers and underside of bolt heads.; Torque bolts to 65 ft./lbs. in three steps (40-55-65), following the factory tightening sequence (See Figure 3). Check to make sure engine has proper grounds to chassis. When pouring coolant back in the radiator make sure to use at least a 50/50 mixture of coolant to water. A re-torque is recommended after initial start-up and cool-down (allow 2-3 hours for adequate cooling).
Finish Black Oxide
Head Drive Type Hex
Length (16) 1.750 in, (14) 3.780 in, (4) 3.960 in
Material Chromoly