How To Loosen Rusted Exhaust Manifold Bolts with WD-40 Specialist® Penetrant

Spray with WD-40 Specialist® Penetrant. Let sit for 5 minutes and loosen the bolt with a ratchet or wrench. Continue spraying and loosening as needed. Don't rush the process.
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[@Keepmywifesnameoutyafucknmouth]

Excellent. I used this on all my ex girlfriends too.