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

Exotic Muscle 1 7/8 headers

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Old Dec 22, 2006 | 08:04 PM
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Default Exotic Muscle 1 7/8 headers

they came in today, the EM 1 7/8 with merge collectors.
i'll install them starting tomorrow morning along with the solid motor mounts i got from Sam.
have a look......



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Old Dec 22, 2006 | 08:05 PM
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Old Dec 22, 2006 | 08:33 PM
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Beautiful!!!
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Old Dec 22, 2006 | 08:39 PM
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the header gaskets look to thick for cylinder's 3&5 and 4&6....pretty thick on the gasket and thin on the headers.

They look great though!!!!!!!!!!!!!!!!!!!!!!
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Old Dec 22, 2006 | 08:45 PM
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Those are absolutely gorgeous!!
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Old Dec 22, 2006 | 08:58 PM
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Oooh...nice My EM long tubes will be here on Tuesday...thanks for the preview
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Old Dec 22, 2006 | 09:43 PM
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those are amazing... what size are the collectors? ALso what hp / rpm range would you think those would suit best? Details on what kind of a monster motor you are building ??
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Old Dec 22, 2006 | 09:53 PM
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How do the merge collectors work? Are they meant to be a slip fit?
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Old Dec 22, 2006 | 10:15 PM
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the headers were $1625.00 total and i just measured the collectors, there 3in
when i ordered the headers, Merle at EM explained the merge collectors to me but i dont remeber how they make more hp then regular collectors
my motor is a 383 lt4, ported heads, intake, 58mm tb the new custom grind cam will have somewhere @ 240-250 @ .050 dur and upper .580-.600 lift. not sure of exact specs yet. it makes 402hp and 408tq at the wheels now on the motor and after i put the headers on it will go back on the dyno to see what diff it made with just the headers. i will also spray it this time on the dyno to see what it makes on the nitrous.
then i will change the cam and back to the dyno.

i'd like to get @ 450 rwhp on motor with the new cam and headers, thats around what zix here on the forum has. my cam will be pretty much a copy of his.
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Old Dec 23, 2006 | 12:36 AM
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Looks good Mike
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Old Dec 23, 2006 | 01:20 AM
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Tell us how they fit!

The last individual had some significant cutting involved...

They look to be the ticket!
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Old Dec 23, 2006 | 01:36 AM
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I was at EM the other day looking at these before they were coated - very nice. Everything Merle offers is high quality.
I will be interested in seeing what you pick up as I also have a 383 LT4 with shorty headers and know the long tubes should really make a big difference.
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Old Dec 23, 2006 | 03:38 AM
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those look nice seems like top quality!
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Old Dec 23, 2006 | 09:55 AM
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I def. wanna hear about the install keep us posted!
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Old Dec 23, 2006 | 10:50 AM
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Why 1 7/8" primaries? I remember when I was asking header questions and the guys from the SW camp started balking all over the thread about how a 1 3/4" primary is too big.

Now I'm all about "bigger is better" but is 1 7/8" necessary? Is it worth the extra hassle?

Gotta admit the EM longtubes look like underhood jewlery compared to the SW's. What I can't figure out is why the SW headers are more money (stainless aside) and look like total crap!
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Old Dec 23, 2006 | 10:59 AM
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Those are gorgeous!
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Old Dec 23, 2006 | 11:00 AM
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Very nice. Post some installation pictures..
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