ok so i know if you want to go turbo it is a good idea to get a 3' tip, and if your not going turbo then around 2.5' is good....so if i plan on going turbo, do i have to get a 3' tip and just wait until i get the turbo, becuase i know it isnt good to get a 3 i nch tip without some kind of forced induction, correct me if im wrong

 

are you talking about the PIPING or just the tip?

 

while you're waiting, 3" piping is ENORMOUS. you'll notice ENORMOUS loss in lower end torque. for turbo, 3" is also too big - esp. on a civic. probably 2.5 would be adequate

 

oh ok, i thought 3inch was standard for turbos, and i knew i would have enormous loss if i got the 3 inch, while i waited to go turbo...i didnt know i could just go with 2.5 thanks

 

umm just the tip i guess? i want as much power as i can get out of a catback exhaust and a turbo, so what sizes would i go by?

 

an exhaust's tip size shouldn't be considered when talking about power. the size is only on the muffler, thus it's only looks.

 

oh ok, yea im not a bigshot so i d ont care about looks...so 2.5 pipe with a turbo?

 

yup. do you have your kit put together already?

 

no not yet, im gonna worry about that after i get my exhaust

 

yea i thnk your talking about piping man. a N/A civic at hte most should have 2.25" piping, but if your boost 2.25" or 2.75" would be good. 3" is massive. As for the muffler, most mufflers have a 2.5" inlet and hten a 4" outlet. Thatd prolly be good. And remember to get name brand too.