First, it's illegal to remove any of that stuff, and good luck reselling the car. I know I wouldn't buy one with anything removed.
Second, cats are required to keep
some backpressure, otherwise your EGO's will throw a fit. Not cool. Air pump is questionable...
Third,
Moved to Windsor Power Forum
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch 