So i was looking at the size of piping on the after market exhausts, and they are only 60mm= 2.3". what is the stock size? wanted to know because i am probably just going to change my mufflers and need to know the inlet size(2",2.25"etc)....thanks..oh, if you have any suggestions on an aggressive sounding muffler, lmk

 

Stock B-pipe is 2.25" which transitions to 2" at the Y pipe to the mufflers. Inlet on stock mufflers = 2".

 

go with magnaflow.

 

Thanks guys for the info

 

BTW in case your thinking about it. DO NOT use anything bigger then 2.5" Throw that 3" idea out of your mind.

 

greeeddddyyyyyyyyyyy

 

haha, very attentive. you noticed from what i said before. yeah, gotta keep it simple, too afraid of losing power, although that j32 swapped civic with straight 3" sounded awesome!
thanks for the input guys

 

Just get an exhaust cut-out

 

Yeah but that thing had a single exhaust...don't wanna do that to your car. I'd go with 2.5 from cat-back and 2.25 from y-pipe. that's what i have and it feels/sounds damn good. magnaflows are THE SHIT.

to the experts on here...wouldn't a 3" dual exhaust kill the back pressure anyway?

 

3" dual is by far way too much. A true dual system would be 2.25" max.

However I was contemplating doing a 3" single to 2.25" dual y-pipe for my SCed application. Going for 7sq/in of cross sectional area. Just need to find a good solution for the cat. So is the outlet on the Comptech headers 2.5" or 2.25"?