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Discussion Starter · #1 ·
Can a downpipe be fit on my car? or is that mod outdated now.
 

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Discussion Starter · #6 ·
I thought that downpipes helped with catalytic converter flow?
 

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2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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You have to remember that todays cars usually have 2 O2 sensors -- the second one lets the ECU know if the cat is functioning. If you delete the cat you will get a CEL/SES light on the dash for cat/conv efficiency loss.
 
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