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Where can I get Ls motor header flanges?

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Old 05-03-2009, 02:39 PM
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Default Where can I get Ls motor header flanges?

I have some manifolds for a turbo build in a 71 Nova but I think I wannna go the header route and build them. Where can get some flanges to start with? Should I go with steel tubing for the primaries and get it coated or would I be better off using stainless steel to resist cracking and so forth?

One last question is do you think I am wasting my time because there are some guys running stupid fast with manifolds on their cars?
Old 05-03-2009, 03:07 PM
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I'd use stainless, to my experience you get a much nicer product. The bad part is the materials are expensive as hell. The best ive found on the flanges is 150 something at stainless works. there are some on ebay too but by the time you pay the ebay version of shipping they cost more than at stainless works.
Old 05-03-2009, 03:17 PM
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Kooks headers also sell the flanges in 1 3/4", 1 7/8" and 2" sizes.
Old 05-03-2009, 05:30 PM
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Originally Posted by 87silverbullet
I have some manifolds for a turbo build in a 71 Nova but I think I wannna go the header route and build them. Where can get some flanges to start with? Should I go with steel tubing for the primaries and get it coated or would I be better off using stainless steel to resist cracking and so forth?

One last question is do you think I am wasting my time because there are some guys running stupid fast with manifolds on their cars?
how much power you going after? stock manis are putting up some pretty damn impressive numbers. though custom SS headers would be pimp. im planning on doing stock manifolds as 700rwhp is all i'll ever want
Old 05-03-2009, 07:09 PM
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Its going to be at a serious power level. It will be a 427 lsx block and all forged internals and a set of ETP heads.

I remember seeing the Ohio boys running manifolds on one of their cars and putting up mid 7 sec passes.
Old 05-03-2009, 08:59 PM
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sounds nice. what kinda power / turbo you looking at going with? this would give a better idea on what to run though as you mentioned serious power can be had with factory manifolds. as far as MS vs SS, other than for corrosion reasons the MS is eaiser to work with and less prone to cracking due to heat cycling. i personally learned how to weld on stainless first so its no big deal for me anymore but something to consider
Old 05-03-2009, 10:48 PM
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For that serious of an engine I would definately go the tubular header route, although cast headers would and do work, if your going for more than 1500hp (sounds like you are) your just leaving hp on the table. mostly because that engine is to big for the super short runners of the truck header.
Old 05-04-2009, 07:35 AM
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^^^ That is what i am trying to find out. If I am leaving something on the table going the manifold route. I will most likely put headers on it since everything else on this build is high end.

Does anybody know if the Ohio boys did anything to modify their manifolds such as port them or extrude hone them?
Old 05-04-2009, 11:40 AM
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Originally Posted by 87silverbullet
^^^ That is what i am trying to find out. If I am leaving something on the table going the manifold route. I will most likely put headers on it since everything else on this build is high end.

Does anybody know if the Ohio boys did anything to modify their manifolds such as port them or extrude hone them?
i dont know about modification but i just read in the "baddest lsx" thread that they went 202 mph in a pretty heavy car with manifolds....i dont think they are much of a restriction
Old 05-04-2009, 12:22 PM
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Originally Posted by crf538
I'd use stainless, to my experience you get a much nicer product. The bad part is the materials are expensive as hell. The best ive found on the flanges is 150 something at stainless works. there are some on ebay too but by the time you pay the ebay version of shipping they cost more than at stainless works.
you coul hve them made for cheaper then that
Old 05-04-2009, 12:50 PM
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Originally Posted by Big_Bird_WS6
you coul hve them made for cheaper then that
i actually did a drawing to do that, if you had a friend that would cut them real cheap maybe, or a shop that had enough scrap lying around, material is expensive. i was gonna get a 4x4 sheet of em cut and sell the rest, just wasnt worth it when i checked all the prices. like i could made some money but not enough to justify
Old 05-04-2009, 12:55 PM
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If you do decide to go the header route, spd exhaust relrased there 2009' online catolog, they have multiple ls header flanges and more turbo gadgets than I can remember.
Old 05-04-2009, 01:26 PM
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crf538,
you did a drwing. like a cad drwing? can i get that file from you?
Old 05-04-2009, 01:30 PM
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yeah, its save on my computer at school, i can get if for you next time i go up. might be a couple of weeks, if you need one sooner there are a few others floating around if you search
Old 05-04-2009, 05:16 PM
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i got mine from LPE for like 75 bucks for the one, stainless and great product
Old 05-04-2009, 05:20 PM
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as I messaged... MeanYellowZ on here has some sets of header flanges... Pm him if interested...
Old 05-04-2009, 07:03 PM
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If you need flanges,tubing, collectors or anything else give us a call in the shop we could make you up a whole kit if you like
Old 05-05-2009, 10:20 AM
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Would you need the dimensions of the engine bay so you could do a mock up and know where to place everything?

What ballpark figure we looking at here?



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