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What is the lower intake manifold torque spec on a 97 Chevy 5.7L?

Intake Manifold Bolt & Runner Bolt Tightening Sequence

20–25 lb-in (Nm)

90–100 deg (52–58 Nm)

Intake Plenum Bolts

7–10 lb-in (0.8–1.1 Nm)

18–22 lb-ft (24–30 Nm)