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ToyotaEarly Chevrolet LS Head Bolt Installation Guide (2003 & Earlier, Hex) — XP987
Complete head bolt installation walkthrough for 2003-and-earlier Chevrolet Gen III LS engines (hex) — 11mm 30/55/80 and 8mm 25 ft-lb torque specs, washer orientation, and the XP987 vs XP981 model-year check.
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