2.25 or 2.5" for single cam boosting later
 

im swapping my exhaust when i put in my jdm d15, which piping would be better, would 2.5 be too much for an na d15? does it make a difference when i boost?

Re: 2.25 or 2.5" for single cam boosting later (Art In Motion)
 

i have an 2.5" AEM exhaust on my stock little d16y8 and it's fine

Re: 2.25 or 2.5" for single cam boosting later (vsm98civic)
 

Yes, 2.5 is way too much for a D15.

I had 2.25" on my stock Si..... D15 boosted try 2.25"

Re: 2.25 or 2.5" for single cam boosting later (Poop111444)
 

2.5" https://honda-tech.com/forums/images/smilies/emthup.gif

Re: 2.25 or 2.5" for single cam boosting later (egb18turbo)
 

mixed opinions...
how much louder will 2.5 be?

Re: 2.25 or 2.5" for single cam boosting later (Art In Motion)
 

both will be loud no doubt (add resonators), but my friend has a 14b boostin y7 stock and once he got a 2.5" exhaust on, it felt that there was power loss and so he wants an e-cut out (compared to open down pipe obviously lol)

Re: 2.25 or 2.5" for single cam boosting later (Art In Motion)
 

2.5 NA or boosted.

Spade proved this to me with his dyno numbers. 126whp with intake, header, exhuast, intake manifold

Re: 2.25 or 2.5" for single cam boosting later (JDM EK9)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM EK9 &raquo;</TD></TR><TR><TD CLASS="quote">2.5 NA or boosted.

Spade proved this to me with his dyno numbers. 126whp with intake, header, exhuast, intake manifold</TD></TR></TABLE>
thanks https://honda-tech.com/forums/images/smilies/emthup.gif

2.5 should be fine...no sense in buying a 2.25 then buying a 2.5 after you boost. I have 2.5 on my D16 and plan on boosting it. Runs fine NA right now.

Re: (H23 EG Hybrid)
 

what about the muffler, is any one running boost with an es oval? i just want something clean and not too loud but is it too restricting for turbo?

boosted d16z6 w/ jdm d15 head
2.25" mandrel bent from cat back
"cherry bomb" muffler as a resinator
Unknown brand muffler
I give my setup a https://honda-tech.com/forums/images/smilies/emthup.gif https://honda-tech.com/forums/images...es/emsmile.gif Its not too loud. It actually got really quiet once I put the turbo on.

Re: (Art In Motion)
 

I have a 2.25 on my d16z6. 2.5 will gain bottom end but lose top. u dont have VTEC so it doesnt really matter for u. both will be ricy haha resinators help...mine broke randomly while driving...sounds crappy. Good luck

Re: (HondaVTEC93)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaVTEC93 &raquo;</TD></TR><TR><TD CLASS="quote">I have a 2.25 on my d16z6. 2.5 will gain bottom end but lose top. u dont have VTEC so it doesnt really matter for u. both will be ricy haha resinators help...mine broke randomly while driving...sounds crappy. Good luck</TD></TR></TABLE>

im sorry to tell you this but you have it backwards
the smaller the piping the more low end you will have
because the backpressure helps low end tourque https://honda-tech.com/forums/images/smilies/emthup.gif

Re: (wannabe_si)
 

ok im goin with 2.5, can someone answer my question about the muffler?

Re: (Art In Motion)
 

For boost definately 2.5 inch, as for the muffler make sure it is 2.5in as well

Re: (CivicGSR225)
 

Why would you want to put a resonator on it? I dont have a resonator on my Civic EX. I have 2.5 cat back mandrel bent into a mangnaflow muffler.

Re: (harwood39)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by harwood39 &raquo;</TD></TR><TR><TD CLASS="quote">Why would you want to put a resonator on it? I dont have a resonator on my Civic EX. I have 2.5 cat back mandrel bent into a mangnaflow muffler.</TD></TR></TABLE>
so it doesnt sound like ass

Re: (Art In Motion)
 

I have a magnaflow cat back. 2.25" piping with resonator. It's nice an quiet with a real deep tone. I love it, rattle a bit tho, dont know whats up there....

Re: (spyderracing32)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spyderracing32 &raquo;</TD></TR><TR><TD CLASS="quote">I have a magnaflow cat back. 2.25" piping with resonator. It's nice an quiet with a real deep tone. I love it, rattle a bit tho, dont know whats up there....</TD></TR></TABLE>
ive been looking around for one of those....where did you get it how much???
is it the really stock looking clean one or the caister style???

Re: (Art In Motion)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Art In Motion &raquo;</TD></TR><TR><TD CLASS="quote">
ive been looking around for one of those....where did you get it how much???
is it the really stock looking clean one or the caister style???</TD></TR></TABLE>

Ebay sells them all day long for a good price https://honda-tech.com/forums/images/smilies/emthup.gif

Re: (vsm98civic)
 

i looked on ebay all i saw was the canister style!

Re: (Art In Motion)
 

Im going with 2.5" on my similar set up

I've got a twin loop...hella quiet. Only time it gets loud is when you go stomp on it. Mine would be a little more quiet if I were to run a HF cat...but I have a test pipe and it does just fine. Have yet to be pulled over or anything.

http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg

Re: (H23 EG Hybrid)
 

a good place to get them is at http://www.kteller.com

Re: (H23 EG Hybrid)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H23 EG Hybrid &raquo;</TD></TR><TR><TD CLASS="quote">I've got a twin loop...hella quiet. Only time it gets loud is when you go stomp on it. Mine would be a little more quiet if I were to run a HF cat...but I have a test pipe and it does just fine. Have yet to be pulled over or anything.

http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg</TD></TR></TABLE>
w0w sooo sexy....
im running 2.5 inch under the gas tank (one bend), and im planning to turbo my lil d15. as stated earlier no use in getting a 2.25 then upping it when u turbo.
ive been pulled over once, but no tickets, jus a warning. not too loud, but really loud when u gun it.... my verdict is https://honda-tech.com/forums/images/smilies/emthup.gif https://honda-tech.com/forums/images/smilies/emthup.gif https://honda-tech.com/forums/images/smilies/emthup.gif 2.5