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Q: What is the best oe exhaust manifold replacement on 1999 Jeep Wrangler

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Bad motor mounts causes cracking in manifold.
Bad motor mounts should not cause exhaust manifold to crack. The manifolds crack from vibration and stress and is quite common on the 4.0L engine. You answered your own question on manifold replacement, use OE parts from your dealership.
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