thinking of changing my car exhaust system..
i'm driving Gen2 1.6(A)
but as i know is different between manual and auto one....
manual mostly go for straight pipe........
then wat about auto car??

i plan change my whole exhaust system.
currently in the market,i only saw Zenden and hotbit extractor...but they are not staineless steel.so is there any staineless extractor out there ?
and middle box ? muffle ? S type better for auto or straight ?

can any sifu give help help here ??