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

finally doing headers, questions, HELP.

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Old 08-23-2008, 11:18 PM
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Default finally doing headers, questions, HELP.

so my setup will be...coated pacesetter lts, magnaflow catback, pacesetter y pipe, stage 8 locking header bolts, havent decided on gaskets yet but what else do i need? what about 02 extensions? im 99% sure i need these, and i need 1 or 2? also what length? i know these are noob questions but dont have time to go look and figure it out myself because i would like to get stuff ordered ASAP.
Old 08-23-2008, 11:22 PM
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Yes, you do need o2 extensions. You will need two, but I have heard of some people getting away with 1.... But Id get the two just to be safe (its what I do). Not sure on the length, but they dont need to be killer long.

Order yourself some Felpro gaskets or Stock replacements, they work great.

EDIT : Good choice on the stage 8 locking bolts too, you wont regret it.
Old 08-23-2008, 11:27 PM
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nvm the kit comes with 02 extensions. do you know a site i could order oem gaskets? i didnt really have luck finding any online and dont feel like putting up with bullshit from a dealership.
Old 08-23-2008, 11:30 PM
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I would buy the caspers o2 extension's!!!! The one's that come with the pacesetters are CRAP! You have to splice them in and the wire is shitty quality!
Old 08-23-2008, 11:31 PM
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oh also for the stage 8 bolts, do i get 1"?
Old 08-23-2008, 11:34 PM
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I just used the bolts that came with the headers. After I retorqued them two different times within 100mi, they have not came loosein 2500mi. Also pretty sure you need two o2 extensions.

Last edited by kinglt-1; 08-23-2008 at 11:47 PM.
Old 08-23-2008, 11:35 PM
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http://www.amazon.com/gp/product/B000IJPK26

those?

edit: nvm i found the exact ones on lmperformance. should i go with 24 inch or 36?
Old 08-23-2008, 11:37 PM
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how do i know if im obd1 or 2 :S

its a 95 so that would be obd2 am i correct?
Old 08-23-2008, 11:40 PM
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Yes, but go to jegs.com, Much faster shipping and they have the right ones. Also get the MR. Gasket Ultra seal LT1 header gaskets for 21.99, then get the jegs 3" preformed stainless exhaust band clamps 11.99 !
Old 08-23-2008, 11:54 PM
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Hey, I think you are going to need 2 extension's no matter if you are obd1 or obd2. A good way to check is to pop the hood and see if you have one on both banks. Obd2 cars have 4 o2 sensors total and are going to have dual cat's w/ an o2 sensor behind each cat. obd1 is just going to have have 2 o2 sensors and 1 cat, w/ nothing after the cat.
Old 08-23-2008, 11:59 PM
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I spliced the o2 wires with i believe it was 18 guage? automotive wire to make them longer......very cheap and works the same just gotta tape it with automotive/high temp ductape and make sure its water tight and you're good to go. just my .02 if you need extensions..
Old 08-24-2008, 12:05 AM
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Originally Posted by lt1noob
how do i know if im obd1 or 2 :S

its a 95 so that would be obd2 am i correct?
Your car is an OBD1 with an OBD2 connector, if its a 1995. Transition year.
Old 08-24-2008, 12:16 AM
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yeah i only have one cat i do remember that when i looked under the car, so does this mean 2 02 extensions?
Old 08-24-2008, 12:25 AM
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Yea because you have a o2 sensor on each side of the motor, Bank1 and Bank2. Sorry hope I did not confuse ya.
Old 08-24-2008, 12:26 AM
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Yeah, even if you have one cat you still have 2 O2 sensors. One in each manifold no matter what.


In OBDI cars there is 2, just two pre-cat O2 sensors to tell the PCM how the engine is running, and what changes are needed if any to the A/F ratio.

In OBDII cars there is 4, 2 pre-cat and 2 post-cat (the 2 pre-cat O2s actually take readings on the A/F and tell the engine how to run like stated before, the post-cat O2s only check to see if the cat is working).
Old 08-24-2008, 12:31 AM
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oh alright, got it. now another question...im checking out jegs right now and theres gm flat and gm square for the caspers 02 extensions, which will i need?
Old 08-24-2008, 12:36 AM
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GM square (4 wire) if I am not mistaken...
Old 08-24-2008, 12:58 AM
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alright, thanks for all the help guys. honestly couldnt have figured this out without you.
Old 08-24-2008, 01:07 AM
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If you want to confirm what connector you have (I forgot what years have what) you can just look under the car and see what it looks like (flat, or 4 pin square)...

I am almost positive yours is also a 4 pin though, just not 100% (real damn tired too).



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