Stock o2 housing + aftermarket downpipes
Stock downpipe to 3" HFC here. I used a new stock metal gasket > ETS adapter > Vibrant 3" gasket and don't have any leaks. It is possible if you get the right parts.
This thread is bringing back nightmares from installing my Cobb DP. If I could do it again, I would probably get an O2 dp rather than just the lower half. I hate that I will probably have to do this again.
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