Ford Focus Forum, Ford Focus ST Forum - View Single Post - signs of clogged cat
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Old 11-10-2012, 07:12 PM   #5
sleepyboy
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Sounds like you have a clogged or damaged cat to me. When mine broke into pieces and clogged the pipe the exhaust note was much much quieter and I eventually had to damn near floor it just to keep up with traffic. That was when I decided to put my header on and sure enough when I took the cat off it was broken. You could even see where it was glowing red hot at one point, it discolored the metal so bad. Felt like I gain 40hp when I hollowed it out lol
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