I have a newer car with a precat oxygen sensor,and after cat sensor,I welded steel tubing in place of cat no problem,and every other car I owned with cats.from late 70s to 99.They make test pipe for most cars to test power without the cats.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt