OK basically i'm looking for a downpipe portion to bolt onto my
stock exhaustmani.

i've got a jdm d15bvtec stock z6 header.
if you've ever looked at the merge collector on the stock header,
it's puny, I think it's like 1.5" or something!

Are there any stock downpipes from maybe another model that I can bolt up that would provide more flow? Or is modifying the stock one the only option?

Thanks

P.S.
Yes I know I could just get a completely new header,
that's not what this thread is about.

 

the Y8 manifold would be your best bet

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenej8power &raquo;</TD></TR><TR><TD CLASS="quote">the Y8 manifold would be your best bet</TD></TR></TABLE>

yep...

 

Y8 ftw, one question is first gen or second gen better? I have the first gen and the top part looks restrictive compared to the second gen.

 

well all I care about is the downpipe portion really..

probly gonna keep my z6 cast mani, just love the sound it gives. I think all that iron muffles/smoothes the exhaust tone

 

Y8 then

 

does anyone have a pic of the y8 header

 

yeah the y8 is pretty nice..

i'm wondering now if its downpipe will bolt up to my z6 mani..

 

ok this guy just sent me pics of a y8 header he has fs.

looks pretty damn good for an oem header! dang!

 

mine look just like those but w/o the rust. they look more like the ITR header just that mines for a single slammer

 

so you want to stick with your cast manifold???
i think you would get a little more from a full Y8 mani.

 

i'm sure the y8 mani would give me more.
but a full kamikaze style header with 2.5" collector/outlet would give me maximum gains.

If I do my motor build later on then i'll need that.

but yeah, i'll probably just stick with the cast 4 now..
and yes, I know it's insane, haha.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohcVTECeg2 &raquo;</TD></TR><TR><TD CLASS="quote">mine look just like those but w/o the rust. they look more like the ITR header just that mines for a single slammer</TD></TR></TABLE>

yeah, yours must be pretty new, or hasn't seen much weather,

that's an awsome header to have.
especially after looking at these pics I think the y8 header is really the jdm itr of sohc's!

 

y8y8y8 y8 for the win

 

hehehe,
us sohc guys get over the little things in life

 

If you have fab skills or can get it done for cheap this might help.

http://www.hadamotorsport.com/....html

http://www.hadamotorsport.com/....html

 

ah, in the interest of open knowledge.
I just found out the y8 header actually only has a 1.5" outlet, just like the z6 header.

which is a bummer, you would need to do the same mod to the y8 downpipe as the z6

thanks for the link ekkkay, that's exactly what i'm planin on doin.