Well I degutted my cat., and 10,000 miles later still no checke eng. light, so I think your ok.
Later Nick


99 tour se zetec
complete painted interior, BN white gauges,
4.5in. fab. aluim. cold air in take, no res, ported man. hooker header areo chamber muffler, 9mm Ford Racing wires, and bla bla bla more stuff,
painted rear ref., mesh top and bottom, L.E.D w/direction turn signal, trible flames down both sides, L.E.D. washer fluid lights, AND Alot More