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

EM LT1/L98 Full Length Header-GP

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Old Jun 5, 2005 | 08:52 PM
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Default EM LT1/L98 Full Length Header-GP

Exotic Muscle is offering a group purchase on LT1 Full length headers. Price is normally $771.00 the GP buy in is $671.00 a $100.00 saving for Corvette Forum members.

Details: Only 10 sets are offered for group purchase after they are gone price goes up to $771.00. Headers are paid for in advance buy contacting Merle @ Exotic Muscle 480-967-4222. EM accepts VISA, MC, AMEX, DISC or Money order. Canceled GP orders have a 10% cancelation fee. Headers will be shipped on a first come first served basis in aprox. 6 weeks. Shipping is $37.00 in the cont. U.S..

Stats: The headers are ceramic coated inside and out. They are constructed with a 1 3/4" primary tube and a 3" slip fit collector. The headers have air pump fittings and o2 sensor bungs in the collector. The flanges are 3/8" thick.

Options: EM offers a slip fit header extension that will fit a Corsa or stock exhaust systems with some cutting. They are offered 3 ways, Extensions std painted $195.00, Extensions coated $270.00 and extensions with high flow Random Tech cats $549.00. O2 simulators are $125.00 for the pair. Felpro exhaust gaskets and Stage 8 self locking bolt fasteners are also available.
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Old Jun 5, 2005 | 10:40 PM
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Correct me if I'm wrong. If I order the headers with the extensions, I get the headers plus the two pipes each side right before the resonator?
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Old Jun 5, 2005 | 10:52 PM
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someone posted yesterday that NO ONE makes an emissions legal header for the LT1/LT4 - is this true? or are these headers emissions legal?
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Old Jun 5, 2005 | 10:57 PM
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yes they have 02 bungs and air fittings atleast there leagle for the lt1 dont know about the lt4
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Old Jun 5, 2005 | 11:20 PM
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Originally Posted by Togo
someone posted yesterday that NO ONE makes an emissions legal header for the LT1/LT4 - is this true? or are these headers emissions legal?
Well...yes that's true, technically long tube headers are not legal for street use. However, it's just a matter of who actually enforces that. California does with strict (from what I hear) visual inspections...every aftermarket part needs to have an EO number that states it's emissions compliant. I live in Arizona, and we do not have very strict visual inspections so I never get any slack about having long tubes on my car. Check with some people in your area to see what your local testing centers are like and go from there!
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Old Jun 5, 2005 | 11:41 PM
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Originally Posted by Zix
I live in Arizona, and we do not have very strict visual inspections so I never get any slack about having long tubes on my car. Check with some people in your area to see what your local testing centers are like and go from there!
i too am in AZ!
i'm just thinking - i paid $4000 for the car - do i really want to put almost $2000 of exhaust work on the car? seems kinda foolish to me at this point, especially since i really really want a C5!

not to hijack - but PM me - you need to get involved with our local group!
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Old Jun 6, 2005 | 02:02 AM
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I installed these a few weeks ago on my '96 auto...

They are excellent in fit and quality (the headers). The only caveat is with the extensions if you plan to fit them to an auto transmission. The flanges need to be relocated about 3" rearward to fit. This basically means having the flanges cut and the two pieces welded. Then it'll fit great. There is also the issue of the AIR fitting on the passenger side. It's not EM's problem. Just something of which to be cognizant.

Read my install tips here http://forums.corvetteforum.com/show...63&forum_id=34

You'll have to scroll down.
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Old Jun 6, 2005 | 06:17 AM
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Originally Posted by Togo
someone posted yesterday that NO ONE makes an emissions legal header for the LT1/LT4 - is this true? or are these headers emissions legal?
From what I understand, to be "legal" you can't move the cat from it's original location. Most places, as long as you still have the cat, you'll get by.

Last edited by R23HTC; Jun 8, 2005 at 12:21 PM.
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Old Jun 6, 2005 | 08:25 AM
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Originally Posted by R94 LT 1


Correct me if I'm wrong. If I order the headers with the extensions, I get the headers plus the two pipes each side right before the resonator?

I'm pretty sure that's the case. We installed these on a buddies cal a while back. He did not order the extensions, and with a bunch of cutting, wemade it fit. He used dynatech cats.
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Old Jun 6, 2005 | 12:41 PM
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Originally Posted by Dan Parker '96
I installed these a few weeks ago on my '96 auto...

They are excellent in fit and quality (the headers). The only caveat is with the extensions if you plan to fit them to an auto transmission. The flanges need to be relocated about 3" rearward to fit. This basically means having the flanges cut and the two pieces welded. Then it'll fit great. There is also the issue of the AIR fitting on the passenger side. It's not EM's problem. Just something of which to be cognizant.

Read my install tips here http://forums.corvetteforum.com/show...63&forum_id=34

You'll have to scroll down.
Thanks for the tips. I just called EM and got their voicemail. I want to order these for my 94. I've got a six speed so I want to make sure there is no other issues like you had with the automatic. How is the spark plug clearance for changes? In the pictures it looks tight. Not like the factory manifolds but still tight.
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Old Jun 6, 2005 | 12:46 PM
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Originally Posted by jwt1603
Thanks for the tips. I just called EM and got their voicemail. I want to order these for my 94. I've got a six speed so I want to make sure there is no other issues like you had with the automatic. How is the spark plug clearance for changes? In the pictures it looks tight. Not like the factory manifolds but still tight.
He was probably on the phone with me. I'm officially in!
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Old Jun 6, 2005 | 12:49 PM
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when i talked to trevor at em he said they fit the 6 sp cars very well have to mod a little for autos
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Old Jun 6, 2005 | 01:01 PM
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That first picture sure looks a lot like my engine.
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Old Jun 6, 2005 | 02:04 PM
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Mmmmm... sweet deal on these headers!
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Old Jun 6, 2005 | 02:17 PM
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Originally Posted by R94 LT 1
He was probably on the phone with me. I'm officially in!
Well darn it. I'm playing phone tag with him now trying to get in. I talked to the "boss" and she said to go ahead. This is after she "let" me order wheels Saturday. (She's really not that way, just teasing her.) She said she wanted the extra wheels so we could mount the autocross tires to them!
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Old Jun 6, 2005 | 03:33 PM
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I'm in!
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Old Jun 6, 2005 | 06:37 PM
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Originally Posted by R94 LT 1
He was probably on the phone with me. I'm officially in!
Got through and placed my order. Merle was very helpful. I got the headers, extensions to eliminate the cats, and the Corsa exhaust, plus all the other stuff to make it all work.


Great guy to deal with. Answered all my questions and explained anything I asked about.
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To EM LT1/L98 Full Length Header-GP

Old Jun 6, 2005 | 08:04 PM
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i need to get on this asap. probably a little late to call now i need to call tomorrow morning
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Old Jun 6, 2005 | 08:18 PM
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Originally Posted by 1996man
i need to get on this asap. probably a little late to call now i need to call tomorrow morning
FYI they are in AZ and are now on Pacific time. I'm on Eastern. Waited ALL day to get through!
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Old Jun 6, 2005 | 10:43 PM
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Originally Posted by FoolCrzy
I'm in!
Nice!!! Header mod day, round #2!

Guys, this is a great deal on some great headers.
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