stock exhaust size questions.

[94exa2]

Hey guys, i am wondering what the stock exhaust size is for two differant cars. any help would be greatly appreciated.

99-00 civic ex 4 door stock exhaust diameter?
99-00 civic si coupe stock exhaust diameter?

thank you guys!

 

[TerriYockee_Boi]

ex/lx/dx/cx/hx stock exhaust pipe sizing is 1.75"
si stock exhaust pipe sizing is 2.25"

 

[94exa2]

ex/lx/dx/cx/hx stock exhaust pipe sizing is 1.75"
si stock exhaust pipe sizing is 2.25"

positive? if anyone else has anything to back that up or disprove it, plz enlighten me (not saying y our wrong, just wana be 100%

 

[Daddy_Digital]

he is right.

 

[94exa2]

so em1 si exhaust is 2.25"
dc2 itr is 2.25" as well? which muffler would you say flows better?

reason i ask, is because i have 2.25" mandrel catback on my ej1 and looking for the quietest muffler i can use, but still flow quite well...

 

[TerriYockee_Boi]

all b series stock exhaust piping is 2.25"

in theory i believe the itr stock muffler should be higher flowing than the em1, gsr, or ls muffler. but im not positive about that.