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Between the "Y" or "H" pipe and the exhaust manifolds. One on each side of the engine with two converters in each pipe. If you crawl under the car, they should be on either side of the transmission. They will look like a smaller version of the muffler, but they will have heat shields welded around the actual converter.

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12y ago
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Q: Where are the catalytic converters on a 1998 grand marquis?
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