LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Prettiest $300 I've spent in a while

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Old Mar 3, 2011 | 04:39 PM
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Default Prettiest $300 I've spent in a while

brand spanking new in the box

( Yes I know I have it laid out wrong, but I had to be able to fit it in the pic)




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Old Mar 3, 2011 | 04:43 PM
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Lpps?
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Old Mar 3, 2011 | 04:46 PM
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Those look really nice. I'm looking to get a set for myself soon. I've been wanting to see how well the inside of the y-pipe merge looks. Could you shine a flash light up the y-pipe and get a pic of how the two tubes come together? I'm mostly curious on how cleanly and well matched the hole in the one pipe is that the other merges into.
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Old Mar 3, 2011 | 04:54 PM
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Looks good! are those eBay headers? Look exactly like my eBay headers. Biggest pita is clearancing em for the steering shaft.
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Old Mar 3, 2011 | 04:56 PM
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Originally Posted by 97pontta
Those look really nice. I'm looking to get a set for myself soon. I've been wanting to see how well the inside of the y-pipe merge looks. Could you shine a flash light up the y-pipe and get a pic of how the two tubes come together? I'm mostly curious on how cleanly and well matched the hole in the one pipe is that the other merges into.

Yeah I'll do that tonight

Originally Posted by Fazz73jr
Looks good! are those eBay headers? Look exactly like my eBay headers. Biggest pita is clearancing em for the steering shaft.
Nah I forgot what brand they are, they are from DNAmotoring or something. no idea
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Old Mar 3, 2011 | 05:16 PM
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Could you please measure the diameter of the tubing. Both the smaller and the stepped portion?
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Old Mar 3, 2011 | 05:43 PM
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Originally Posted by gregrob
Could you please measure the diameter of the tubing. Both the smaller and the stepped portion?
I measured everything on mine (same headers) before I threw them on. https://ls1tech.com/forums/lt1-lt4-m...xperience.html

These headers are FTW, even if you do decide to bash the #1 primary in for fitment (there are other ways to make them fit). Can't go wrong for $300!!
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Old Mar 3, 2011 | 06:01 PM
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for a minute there i thought that you were the ******* that outbid me on a set of dynatechs on ebay the other week.

My 2 minute left dick-bid didnt work lol.

Nice anyways, were those on ebay or did you get them off another person? or did you use DNAmotoring's store on ebay?
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Old Mar 3, 2011 | 06:04 PM
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For what it's worth, I measured a set of "OBX" LT1 headers and tubes off of the flange are 1.7" and the "stepped" tubes are 1.8". Measured with a digital vernier caliper.
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Old Mar 3, 2011 | 06:34 PM
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Originally Posted by Black1995Z28
Nah I forgot what brand they are, they are from DNAmotoring or something. no idea
If they are the headers I am thinking about, they require A LOT of modification to clear everything. They especially hit the steering knuckle and k-member. I had to dent the #1 primary and I had to clearance the k-member to get them to fit. Hopefully you don't have as many issues as I did. Btw, get some poly motor mounts before you install the headers, they are a must!
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Old Mar 3, 2011 | 07:17 PM
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Originally Posted by trilkb
Nice anyways, were those on ebay or did you get them off another person? or did you use DNAmotoring's store on ebay?

I got em from a guy in my city
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Old Mar 4, 2011 | 05:43 PM
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I have the same set and love them.

Ding the #1 and grind some steering shaft off and you will be set.

My install was pretty damn smooth.


My Y pipe fits poorly but for 300 bucks, you cant beat it.

Every LT1 should have long tubes now.
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Old Mar 4, 2011 | 06:25 PM
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dude for 300 bucks beat what you have to beat....road conditions will do its number on them sooner or later anyway.mine sound like sex even with the knockoff flowmaster muffler.my ypipe fit kind of funky also but some band clamps and high temp silicone took care of that for me
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Old Mar 4, 2011 | 08:04 PM
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My experience with these headers.
Heated the first primary to cherry red and beet it in about 3/8 of an inch. By using heat it was easy to dent and formed nicely. Just a daily driver so it didnt matter to me. honestly dont think it retricts much anyways. clears the steering knuckle probly 1/4 inch with no grinding on the knuckle. they also rub the body on the lower passenger side but no modification was needed to get that side to fit in. no problems or noise has resulted yet. i have a tubuler k member so clearence for that was not an issue. hope this helps. Overall i'm very happy and would do it again. For being as cheap as they are I actually thought the quality was great. Flanges were completly straight on mine.
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Old Mar 4, 2011 | 09:46 PM
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Im running those headers aswell. I have a post about them. I quite like them. They did require abit of massaging (by that i mean beating with a hammer) to fit 100%. but that was all worth it. I also scrappy the Y-pipe that came with it in favor of one that i fabricated (i also have a post on that) GL
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Old Mar 4, 2011 | 10:51 PM
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Originally Posted by 05HD
I measured everything on mine (same headers) before I threw them on. https://ls1tech.com/forums/lt1-lt4-m...xperience.html

These headers are FTW, even if you do decide to bash the #1 primary in for fitment (there are other ways to make them fit). Can't go wrong for $300!!
The ones you installed do not look like KOOK copies. They look indentical to LPP's.

The KOOKs copies are the "OBX" and "SPEEDDADDY" headers.

Regadless though its good information. I just wanted to verify that these actually measure out to a full 1 7/8 step and it appears they do.

A guy got the "eworldsales" Pacesetter non stepped style which were advertised as 1 3/4 and they ended up being 1 5/8, which would thoroughly **** me off.

Last edited by gregrob; Mar 4, 2011 at 10:58 PM.
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Old Mar 4, 2011 | 10:59 PM
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Originally Posted by 1badzee
For what it's worth, I measured a set of "OBX" LT1 headers and tubes off of the flange are 1.7" and the "stepped" tubes are 1.8". Measured with a digital vernier caliper.
1.7 and 1.8 exactly?
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Old Mar 4, 2011 | 11:20 PM
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Originally Posted by gregrob
1.7 and 1.8 exactly?
Yeah, I found it really odd. It might have been like 1.701 and 1.81 for argument's sake, but they were pretty much round numbers.

I will measure again next time I am at my friend's shop.
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Old Mar 5, 2011 | 07:52 AM
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Originally Posted by gregrob
I just wanted to verify that these actually measure out to a full 1 7/8 step and it appears they do.
I forgot the exact specs on the OD of mine (i got them from ap1ap2) but they were just atad bigger then what they said they were. 1-3/4" - 1-7/8".
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Old Mar 5, 2011 | 10:15 AM
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I need to get a hammer it seems like lol
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