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Universal catalytic converters?

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My 2003 Silverado has 170K, and the cat. converters have been throwing codes ocassionally for a month or two - I reset them, but they come back in a few days. Recently, the passenger side cat. developed a crack in the weld just upstream from that cat. Can a universal cat. be put in place without doing any welding - i.e. a universal cat. of the right length and capability, plus band-clamps on each side with some high temp. gaskets? Changing out the whole cat. system (both sides) seems like a bigger and more expensive project, and might run into stuck/rusted bolts, etc.


What length universal cat. is the best fit for 2003 Silverado 1500 Ext. Cab, passenger side?





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