Um yea your engine will run like crap get 3 mpg and dump black smoke out the tailpipe. I wouldny suggest removing the cat OR the o2 sensor, its illegal to remove the cats anyway. and the o2 sensor tells the engine how to run (richer/leaner) so you wouldnt want to remove that anyway
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97 Ford Ranger- 2.3L 5-speed, 2wd Lowered 5 inches
86 Ford Ranger- 2.9L 5-speed, 4x4
84 Ford Ranger- 302 5-speed, True Duals, Beast!!
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