aftermarket headers w/ d shaped ports?? - LS1TECH

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aftermarket headers w/ d shaped ports??

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Old 04-16-2007, 12:23 PM   #1
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Default aftermarket headers w/ d shaped ports??

OK, I'm a newbie here. I've acquired a LS7 and will be looking for aftermarket or custom headers. When I pulled the stock manifolds off I noticed a D shaped exhaust port. What aftermarket company sells headers with this shape? What have you guys used?

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Old 04-16-2007, 12:31 PM   #2
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ok, newbie from now on use the search as this has been asked several times in the past few weeks. LOL anyways i got my custom headers from american racing. they are all stainless and top notch crew. u cant go wrong with them or kooks.
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Old 04-16-2007, 12:32 PM   #3
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I've already seen some posts regarding this same issue. Sounds like round flange will work. Next question. Can I buy aftermarket flanges that have the same hole pattern in case I want to try to make my own headers? I have a couple directions to run the tubes, not sure which one is best.

Anyone know of a header kit that's decent?
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Old 04-16-2007, 12:39 PM   #4
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I've learned my lesson.

How does ordering from american racing work? I thought that if I needed custom headers I'd need to call someone to come out and take measurements...
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Old 04-16-2007, 01:05 PM   #5
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Quote:
Originally Posted by ls7truck
OK, I'm a newbie here. I've acquired a LS7 and will be looking for aftermarket or custom headers. When I pulled the stock manifolds off I noticed a D shaped exhaust port. What aftermarket company sells headers with this shape? What have you guys used?

Thanks
Kooks will put d port flanges on your choice of headers for an extra $125.
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Old 04-16-2007, 01:20 PM   #6
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I emailed american racing about their custom headers. I'll also contact kooks about their headers. Worst case, maybe they'll sell me some d-shaped flanges.

Thanks for the replies.
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Old 05-02-2007, 02:33 PM   #7
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It wouldnt be worth the money if you can just get a good set of 1 7/8 headers. The d shaped port is to help speed up the exh. flow out of the head and as long as you have a non restrictive set of 1 7/8 you should be fine. my 13/4 are working fine for me but i would love to go to a 1 7/8, it would definetly net me some more power.
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Old 05-02-2007, 03:04 PM   #8
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I do not understand the D shaped port thing. The exhaust ports back to 243s were/are D shaped and the header's inlet flange is larger than the port so?
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