180k on cat; replace?
03-23-2008, 03:05 PM
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180k on cat; replace?
just installed a used dc 4-1 header, and new ws2 exhaust on my 99 si. The header had a tapered gasket that i just reused, and it went right up to the stock cat. love the setup and don't want a test pipe ( 
for earth) so my questions: Does a cat with 180,000 miles still work correctly, and is it worth keeping on or should i just get a highflow carsound?
for earth) so my questions: Does a cat with 180,000 miles still work correctly, and is it worth keeping on or should i just get a highflow carsound?
03-24-2008, 11:59 AM
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Re: 180k on cat; replace? (crazyguy)
my mpg is between 25-28, thats about normal right? passed emissions about 8 months ago. Don't fix it if it ain't broke huh? 1 more question, do you think its adversely affecting exhaust flow? forming a "bottleneck" or "hourglass" being paired with the header and cat back?
thanks for your input guys
thanks for your input guys
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