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Just curious: Headers, X-pipe necessary?

 
Old 07-10-2019, 05:27 PM
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KingCorvette93
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Default Just curious: Headers, X-pipe necessary?

Thinking far off into the future...

Considering headers and x-pipe. Vendors offer them together and separately.

What does X-pipe do? Silly to do headers without it?

Thanks!
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Old 07-10-2019, 05:37 PM
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Aside from B&B headers that bolt up to your OE mid-pipe (only brand that will bolt up), you'll need the "x-pipe" to bolt up every other brand of headers to your axle back mufflers.

Last edited by MTPZ06; 07-10-2019 at 05:37 PM.
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Old 07-10-2019, 05:53 PM
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And to the expand on the above, a lot of vendors sell their xpipe seperately instead of bundling because they sell versions with and without cats.
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Old 07-10-2019, 08:27 PM
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NASCAR uses X-pipes on the cars and for good reason, increased scavenging. Do the headers and do the X.
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Old 07-10-2019, 09:35 PM
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Great info everyone! Thanks!

Originally Posted by NYC6 View Post
NASCAR uses X-pipes on the cars and for good reason, increased scavenging. Do the headers and do the X.

What is scavenging?
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Old 07-10-2019, 10:26 PM
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Originally Posted by KingCorvette93 View Post
Great info everyone! Thanks!




What is scavenging?
This should pretty explain all we need to know.
https://www.onallcylinders.com/2017/...ich-to-choose/
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Old 07-10-2019, 11:03 PM
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Does the C6 has an X-pipe from the factory?
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Old 07-11-2019, 12:11 PM
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Originally Posted by KingCorvette93 View Post
Does the C6 has an X-pipe from the factory?
Yes
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Old 07-11-2019, 12:28 PM
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Originally Posted by KingCorvette93 View Post
Does the C6 has an X-pipe from the factory?
Some do and some don't. I know some have H-Pipes but don't know which ones. My 11' GS had a X-Pipe though but didn't come with the NPP option.
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Old 07-11-2019, 12:30 PM
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Originally Posted by Seadawg View Post
Yes
Early models came with an H pipe. I have heard Z06 do as well but I can't confirm.
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Old 07-11-2019, 01:24 PM
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Do the full long tube setup.

Contact us for pricing!

-Josh
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Old 07-11-2019, 01:51 PM
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C6 Z06 and ZR1 mid pipes are 3", and '06-'10 C6 Z06 came with H pipe, 2011+ came with X-pipe...but the '12/'13 models have the extra 2 cats attached before the X. '09-'13 C6 ZR1 came with X pipe, but again the '12/13' models have the 2 extra cats. No idea on Base/GS for H versus X, but pipe diameter is 2.5" for all years.
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Old 07-11-2019, 03:17 PM
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To the OP .... Think about it

If you install a set of long-tube headers, what are you going to put between your new headers and your mufflers?

Headers are much longer in total length than the stock exhaust manifolds that you just removed ... So, you are going to need a set of intermediate pipes (aka: x-pipe) that are much shorter than the stock intermediate pipes you need to remove.

Cutting your stock intermediate pipes shorter won't work because they won't line up correctly to your mufflers once the headers are installed.

So, you have no choice ... You get a set of headers with the intermediate pipe (x-pipe) that is made to fit that particular brand of headers .... Or you just forget the whole thing and leave your stock exhaust system alone.


Now, see how easy that was ...
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Old 07-11-2019, 04:21 PM
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Originally Posted by Turbo6TA View Post
To the OP .... Think about it

If you install a set of long-tube headers, what are you going to put between your new headers and your mufflers?

Headers are much longer in total length than the stock exhaust manifolds that you just removed ... So, you are going to need a set of intermediate pipes (aka: x-pipe) that are much shorter than the stock intermediate pipes you need to remove.

Cutting your stock intermediate pipes shorter won't work because they won't line up correctly to your mufflers once the headers are installed.

So, you have no choice ... You get a set of headers with the intermediate pipe (x-pipe) that is made to fit that particular brand of headers .... Or you just forget the whole thing and leave your stock exhaust system alone.


Now, see how easy that was ...
Great info, thanks. Didn't know aftermarket headers were longer!

The term headers is the same as exhaust manifold? Seems so!
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Old 07-11-2019, 10:37 PM
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Originally Posted by Turbo6TA View Post

So, you have no choice ... You get a set of headers with the intermediate pipe (x-pipe) that is made to fit that particular brand of headers .... Or you just forget the whole thing and leave your stock exhaust system alone.


Now, see how easy that was ...
You do have one other choice as mentioned earlier. You can get the Billy Boat long tubes that bolt up to your factory xpipe.
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Old 07-11-2019, 11:08 PM
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Originally Posted by doomi View Post

You do have one other choice as mentioned earlier. You can get the Billy Boat long tubes that bolt up to your factory xpipe.
I didn't know that Billy Boat even made headers. I thought they only made mufflers .... thanks for the info
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Old 07-12-2019, 12:01 PM
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Originally Posted by Turbo6TA View Post
I didn't know that Billy Boat even made headers. I thought they only made mufflers .... thanks for the info
I didn't know it either. Then I bought a used set from a member here and thought I got ripped off when he didn't send an xpipe. To my surprise it bolted right up.


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Old 07-13-2019, 05:22 PM
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What are the general power gains with headers, x-pipe, and appropriate tune?

35 hp/tq?
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Old 07-13-2019, 06:10 PM
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^ Sounds right.

-Josh
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Old 07-14-2019, 07:35 AM
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Originally Posted by KingCorvette93 View Post

What are the general power gains with headers, x-pipe, and appropriate tune?

35 hp/tq?
When my 2011 GS (A6) was bone stock, it made 371 RWHP

Installed headers and x-pipe with cats and a dyno tune ... It made 405 RWHP on the same dyno

+ 34 RWHP gain
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