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The earlier Excursions didn't have cats. The computer controls of the system kept the exhaust clean enough to get by without one.
I have a 2000. Don't know when Ford started adding cats.
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2000 7.3L PSD Excursion
4" MBRP 409 Turbo Back
Hellwig Swaybar
Isspro EV, Overhead 3-Gauge Mount
300K and rolling right along
Ford AIS
6.0 Liter Tranmission Cooler
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