S&S Cycle
Fitment check
A saved-bike match is a shopping aid. Always review manufacturer notes, exclusions, measurements, and installation requirements.
The S&S Head Bolt Kit replaces stock M8 head bolts with stronger reusable hardware for 2017-up Harley-Davidson Milwaukee-Eight engines.
Fitment note: Manufacturer-published fitment is for 2017-up Harley-Davidson M8 models.
Complete the job
Confirm the head gaskets, mating surfaces, torque equipment, assembly oil, tightening sequence, and service information before the heads go back on.
See the parts, tools, supplies, and decisions before you buy. Use the manufacturer documents below for procedures and specifications.
Select fresh head gaskets that match the exact M8 bore, cylinder-head surfaces, and build configuration before installing the S&S bolts.
Matching products will appear here automatically as this catalog lane is stocked.
Shop Engine Gaskets SealsBefore assembly, confirm that every mating surface is free of debris and defects that could affect gasket sealing or head installation.
Follow the illustrated cylinder order through finger-tight, 10, 25, 45, and 65 ft-lb; loosen each bolt one-quarter turn at a time in reverse order; then repeat the complete staged sequence.
Use S&S Instruction 510-0662 for the head bolts and the correct motorcycle service information for all remaining cylinder-head disassembly and reassembly.
Have AVT or a qualified engine builder complete the work when surface condition, gasket choice, torque accuracy, or assembly procedure is uncertain.
When it applies: Recommended whenever any required measurement, tool, surface, sequence, or torque value cannot be positively verified.
Use a calibrated torque wrench and 9/16-inch 12-point socket that can accurately complete every 10, 25, 45, and 65 ft-lb pass.
Currently sold out
Lubricate only the internal threads and underside of each new S&S head bolt with clean engine oil before beginning the torque sequence.
Matching products will appear here automatically as this catalog lane is stocked.
Shop Engine Assembly OilsThe primary product and your selected available companions are added as separate Shopify cart lines at current prices.
Confirm exact fitment, included hardware, and manufacturer instructions for your motorcycle and selected product before ordering.