sorry i threw so many repetitive words in the title, i wanted it to be searchable for later. its impossible to search for 'si' so forgive me if there is a thread like this out there i cant find it.

i like quiet oem reliability,so im just wondering what the size of the 99-00 civic si's exhaust. the other alternative is the itr exhaust.

 

pretty sure its 2.25"

edit: 2"

 

its 2"

 

conflicting information... is it like the itr exhaust where it bottle necks and the exhaust flares out to 2.25 right after the cat? or is it 2in all the way through?

it would be awesome if any of it was 2.25 but that seems too good to be true.

 

2". No doubt about it.

 

i am having trouble finding the si muffler. the only mufflers i am finding from honda are the ex and the non ex and for each variation with 2,3,4 doors. so, is it the same as the ex muffler?

 

it bottle necks at the 3 bolt flange after the cat, if you measure the outer diameter of the pipe after the cat it may be 2.25" BUT these pipes are dual wall the ID is 2", this also applys for the 99-00 civic headers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thisisntjared &raquo;</TD></TR><TR><TD CLASS="quote">i am having trouble finding the si muffler. the only mufflers i am finding from honda are the ex and the non ex and for each variation with 2,3,4 doors. so, is it the same as the ex muffler? </TD></TR></TABLE>

the 99-00 2 door EX and Si exhausts are identical, 4 door and hatch are different lengths

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sicones &raquo;</TD></TR><TR><TD CLASS="quote">the 99-00 2 door EX and Si exhausts are identical, 4 door and hatch are different lengths</TD></TR></TABLE>thank you very much sir

so now the question begs to be asked. what is the difference between the ex exhaust and the si exhaust? resonator size?

i think i might just try to chase down a ctr exhaust...

 

i just said there identical

 

oh the whole exhaust, i thought you meant just the muffler indeed