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How to for gutting pre cats

I have some done if anyone wants them for cheap. They have been opened gutted and rewelded. No chance of having some of the honeycomb being sucked back into the engine like some have done.
 
I have some done if anyone wants them for cheap. They have been opened gutted and rewelded. No chance of having some of the honeycomb being sucked back into the engine like some have done.

There is that chance if you choose to gut them while on the car. To do it right, you have to remove them. It'd be a whole lot easier to have an already gutted set to swap out with as soon as you remove your old crusty ones....
 
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