C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

HELP!! need know know what LT headers I got!!

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Old Oct 12, 2006 | 08:31 PM
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Default HELP!! need know know what LT headers I got!!

Ok
like the title says I'm trying to figure out what type of headers I got.
I'm wanting to redone my exhaust and thought that getting a Jet-Hot coating on the LT would be fine but, they are really corroded on the bottom so it would seem like a waste of money. I would like to see if I can buy the same type with a coating on them but again I don't know what type they are. this is for a custom application it is a 87 350 Chevy engine with T-56 in a 84 Mazda RX-7.

No one seem to know on thirdgen.org
and they suggested they many be c4 headers.

Here the pictures





and all I know from measuring it is
that the tubs are 1 3/4" and 2.80" collectors
which I'm guessing is 3" just with a lot of corrosion



Also anyone that know a type that might fit the same way please tell me.

Any help is appreciated

Thanks, JR

Last edited by GM-7 Rocket; Oct 13, 2006 at 12:05 AM.
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Old Oct 12, 2006 | 08:45 PM
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I can't view the pics without a thirdgen login. Can you repost them here?
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Old Oct 12, 2006 | 09:47 PM
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all done. sorry if they are a bit big.

JR
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Old Oct 12, 2006 | 09:51 PM
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Where are the pics?

1 3/4 and 3in collecters is a popular C4 size
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Old Oct 12, 2006 | 11:06 PM
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are they not showing up?
I'm see them on my computer.

let me know
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Old Oct 12, 2006 | 11:20 PM
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not showing up here
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Old Oct 13, 2006 | 12:06 AM
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ok second try

let me know if you see them
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Old Oct 13, 2006 | 01:25 AM
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They look like "tuned long tubes" or that each tube is approximately the same length for each cylinder, and why they are seemingly twisted around each other, to end up at the same location, for the collector connection to the rest of the exhaust system. The tone of the exhaust system is enhanced as well as the back pressure on each cylinder is equal.
Come to think of it, are you sure that is an LT1 engine? 350 CI, possibly.

Last edited by Eddie & the Cruisers; Oct 13, 2006 at 01:31 AM.
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Old Oct 13, 2006 | 01:46 AM
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He didn't say it was an LT1 engine. He said it was an 87 350. As for the headers, they don't look like any production LTs for the C4 I've seen, and I've just been shopping for headers. The way they wrap around in the middle is different. They look like Hooker Super Competition headers to me. The flange is very thick and they are obviously a high quality header. I'm not sure, however, what their original application was for. Perhaps you could contact Hooker with the car type and pics/measurements of these headers and figure out what they have that will work.
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Old Oct 13, 2006 | 02:12 AM
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Originally Posted by JLeatherman
He didn't say it was an LT1 engine.
Sorry, you are right. I'd sworn I saw LT1 in the title but it was "LT" for long tubes.
Guess I've been looking for LT1 parts for my '94 Vert and everything looks like LT1.
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Old Oct 13, 2006 | 04:12 AM
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Thanks for the help guys.

I guess I'm going to move to the next phase
and start sending e-mails to header companies

I tried looking for hooker's home page and can't find it
anyone got a contact # or web address?

and again any more input is always very helpful

Thanks, JR

Last edited by GM-7 Rocket; Oct 13, 2006 at 04:25 AM.
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Old Oct 13, 2006 | 04:27 AM
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not trying to send you away. But your motor swap is common among rx-7s of that gen. Perhaps try a rx-7 forum ?
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Old Oct 13, 2006 | 09:58 AM
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Hooker is made by Holley. Here's their website:

http://www.holley.com/index.asp?division=Hooker

They have a tech help button. I'd try there.
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Old Oct 13, 2006 | 10:20 AM
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This company deals with the SBC swap in to RX7's. Check them out they probally know what headers you have.

www.grannysspeedshop.com

You could also take the header off the car and look on the back side of the flange it should have a PN stamped on there.
Will
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