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Chevrolet Performance 12498545 - LS Head Bolt Kit 1997-03

GM Part Number 12498545 LS Head Bolt Kit 1997-03. This is a set of head bolts to install ONE cylinder head. For a complete engine you will need to order two sets.

New GM torque-to-yield head bolt set for the "1st design" LS engine family also know as the "long" head bolt style blocks. Fits 4.8L, 5.3L, 5.7L and the 6.0L blocks that were made from 1997 thru 2003. GM torque-to-yield head bolts can NOT be re-used once they have been installed and torqued to GM specifications.
Shipping: Free Shipping* on Orders over $99
Pricing: $46.71


See the Documents Tab for cylinder head diagram of bolt sequence and printable instruction sheet.

Torque Procedure for GM LS Heads #12498545

  1. Tighten 1 thru 10 to 22Ft-Lbs (30NM) in sequence
  2. Tighten 1 thru 10 using the Torque Angle Method to 90-Degrees in sequence
  3. Tighten 1 thru 8 to 90-Degrees in sequence
  4. Tighten 9 and 10 to 50-Degrees in Sequence
  5. Tighten 11 thru 15 to 22Ft-Lbs (30NM) in sequence

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


Shipping Information

  • Item Requires Shipping
  • 2.6 lbs.
  • W4.2500” x H4.2500” x L6.7500”
  • Free Shipping* on Orders over $99

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