do you think changing the manifold cats by cutting them out and welding in on 2004 Nissan Titan

Enthusiast 01be16a5a93688912f14755221fb15211b518d9a788cf01b455e03cc1bd585ac
comparable with the same amount of precious metals will suffice versus not buying the whole assembly? there is no codes but pending 0420 catalyst below threshold bank 1 o2s are bouncing well what you guys think i am not trying to be cheap just efficent
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The reason why you have a P0420 code is because of the catalytic convertor is inefficient. The rear O2 sensor reading should not mirror the upstream O2. It should flat line after it has warmed up. Unfortunately Wakler Exhaust does not have an aftermarket listing for the cats.
There's a way to try to clean the cats through a special chemical. It requires a professional shop to clean them. Contact me at