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Dallasb
Posted on Wednesday, March 03, 2010 - 06:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have an 06 xb9. I've heard that you can put an xb12 header on the 9's in order to squeeze out a little more power. Will an 04 xb12 header fit my 06 xb9?
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Duff24
Posted on Saturday, March 13, 2010 - 11:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes.
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Nillaice
Posted on Saturday, March 13, 2010 - 11:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

yep. me and a friend put a 9S header on his 12R. no dyno runs, but with the his D&D its got longer legs. other than that it FEELS faster in the lower RPM range.
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Bishopjb1124
Posted on Saturday, March 13, 2010 - 08:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes but you may loose power due to decreased back pressure.
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Delta_one
Posted on Saturday, March 13, 2010 - 11:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

so a 9 header on a 12 helps a 12 but a 12 header on a 9 can hurt performance?

isn't it the same thing with the pistons too?
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California69gs
Posted on Sunday, March 14, 2010 - 10:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Wait, now I'm curious? I could get more performance putting a xb9 pipe on my xb12scg?

Cuz my header is currently dinged, so I was looking for a 12 replacement.
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Nillaice
Posted on Wednesday, March 17, 2010 - 11:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

what ever you do, you should map it correctly to get the maximum gain/minimal loss. we did nothing of the sort.
the increased back pressure from a smaller diameter header could be negated by the free-flowing D&D, but i'm no rocket surgeon.
i don't know enough about fuel maps to get into a debate about it, so i'll leave that to the internet experts.
if in doubt, just run it stock.
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