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Discussion Starter #1 (Edited)
My current exhaust manifold is an OEM one from amazon replaced 3 years ago.
Got P0420 code 3 months ago and I decided to replace upstream O2 sensor. Now code is showing PA200. Started to notice little loud exhaust sound and then found that the exhaust manifold bottom joint has a small leak.
Purchased new bolt spring and the donut gasket from dealer to tighten the joint.
Tried to remove the bolt/spring that connect exhaust pipe to manifold but its stuck.

Wondering if its worth exploring more options to tighten that leaky joint or better to replace the exhaust manifold itself ($200+)?
 
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