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  1. #1
    Junior Member
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    98 Z28

    Need Advice with Headers

    I am going with some stainless steel headers and ofr y pipe from LLP, which from what I have gathered around here are the SSautochromes. Anyway, I want to go ahead and delete the Air and EGR systems from my 98 z28 A4. I am going through these amazing posts in the sticky and I am not sure if I gathered all the information I need to do this myself.

    1. Headers and ofr y pipe
    2. Exhaust manifold gaskets and bolts
    3. Band clamps
    4. EGR block plates

    Now, I was wondering what do I do with the o2 sensors after I delete the EGR and Air systems.

  2. #2
    Member 2-bowties&abird's Avatar
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    cam/lt headers
    blue 2000 ws6 m6

    Quote Originally Posted by TommiGunn View Post
    I am going with some stainless steel headers and ofr y pipe from LLP, which from what I have gathered around here are the SSautochromes. Anyway, I want to go ahead and delete the Air and EGR systems from my 98 z28 A4. I am going through these amazing posts in the sticky and I am not sure if I gathered all the information I need to do this myself.

    1. Headers and ofr y pipe
    2. Exhaust manifold gaskets and bolts
    3. Band clamps
    4. EGR block plates

    Now, I was wondering what do I do with the o2 sensors after I delete the EGR and Air systems.
    you keep the front o2's delete the rear, your going to need o2 extensions for your lt headers. then get a tune. all done

  3. #3
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    Quote Originally Posted by 2-bowties&abird View Post
    you keep the front o2's delete the rear, your going to need o2 extensions for your lt headers. then get a tune. all done
    He is preaching the truth....

  4. #4
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    98 Z28

    How big of an extension? ''12 or ''24?

  5. #5
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    24 inchs...

  6. #6
    Member Kup98ss's Avatar
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    Arctic White
    2002 A4,WS6

    Will the stock O2's work in the front? Please say yes, I'm cheap. My feelings have all ready been hurt when I found out I need new CATs

  7. #7
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    Quote Originally Posted by Kup98ss View Post
    Will the stock O2's work in the front? Please say yes, I'm cheap. My feelings have all ready been hurt when I found out I need new CATs
    no if your running longtubes...

  8. #8
    Member Kup98ss's Avatar
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    Arctic White
    2002 A4,WS6

    Quote Originally Posted by 99Ls1fever View Post
    no if your running longtubes...
    This is becoming more and more disconcerning as I go on. I'm starting to wonder if it is even worth it.

  9. #9
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    I believe so, i gained forty two horses on my old LS1 with no cats, no egr or air fittings... great hp to cost ratio.... I went with QTP'S though...

  10. #10
    Member 2-bowties&abird's Avatar
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    cam/lt headers
    blue 2000 ws6 m6

    Quote Originally Posted by Kup98ss View Post
    This is becoming more and more disconcerning as I go on. I'm starting to wonder if it is even worth it.
    i used the old 02's and rigged up extensions now my car is throwing codes. instead of doing it the right way off the bat like i should have i have to buy new 02's and extensions and wast time to take it all the way back to the shop. do it right the first time no cheap way around it. as i have found out

  11. #11
    Member Kup98ss's Avatar
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    Arctic White
    2002 A4,WS6

    If you can get 42hp putting headers on with now cats and no egr stuff, what will a good estimate be with high flow cats and all of the extra legal BS be? Would 30hp be a good estimate?

  12. #12
    Member 2-bowties&abird's Avatar
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    cam/lt headers
    blue 2000 ws6 m6

    Quote Originally Posted by Kup98ss View Post
    If you can get 42hp putting headers on with now cats and no egr stuff, what will a good estimate be with high flow cats and all of the extra legal BS be? Would 30hp be a good estimate?
    i would think 20 or so, but i guess it all depends. i never aim to high because usually hp gains are never as high as you think they will be. when some one tells me this doodad will give you 20 i aim for 10.

  13. #13
    Senior Member 01ws6er's Avatar
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    Quote Originally Posted by Kup98ss View Post
    If you can get 42hp putting headers on with now cats and no egr stuff, what will a good estimate be with high flow cats and all of the extra legal BS be? Would 30hp be a good estimate?
    42 ponies I believe is with a tune...

  14. #14
    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
    1998-SS, 2010 Jetta TDI

    here's what i did, i didnt delet my egr because that seemed a little more difficult, i got an ORY and deleted my cats, and I had to get 24 in extensions for the front 02's and simulators for the rear 02's , that was that, picked up some power and a lot of noise, definitely worth it

  15. #15
    Member 2-bowties&abird's Avatar
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    cam/lt headers
    blue 2000 ws6 m6

    Quote Originally Posted by ss~zoso~ss View Post
    here's what i did, i didnt delet my egr because that seemed a little more difficult, i got an ORY and deleted my cats, and I had to get 24 in extensions for the front 02's and simulators for the rear 02's , that was that, picked up some power and a lot of noise, definitely worth it
    yeah but they dont make o2 sims anymore so you would just get them deleted.

  16. #16
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    Quote Originally Posted by Kup98ss View Post
    If you can get 42hp putting headers on with now cats and no egr stuff, what will a good estimate be with high flow cats and all of the extra legal BS be? Would 30hp be a good estimate?
    I have a buddy that went QTP headers on a 2002 WS6 ran all egr and borla 3 inch exshaust with high flow cats and gained 36 horsepower...

  17. #17
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    Quote Originally Posted by 01ws6er View Post
    42 ponies I believe is with a tune...
    yea of coarse... dyno tuned horses.....

  18. #18
    Member Kup98ss's Avatar
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    Arctic White
    2002 A4,WS6

    Quote Originally Posted by 99Ls1fever View Post
    yea of coarse... dyno tuned horses.....
    Was that RWhp or at the crank hp?

  19. #19
    Member Kup98ss's Avatar
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    Arctic White
    2002 A4,WS6

    Quote Originally Posted by 99Ls1fever View Post
    no if your running longtubes...
    Sorry I hijacked this thread.

    What type of 02's Should I get both front types and back please.
    I just can't find them, and it's probably because I don't know what to look for.

  20. #20
    I Like It Stroked 99Ls1fever's Avatar
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    Artic White
    1999 Z28 408 Stroker M6

    Quote Originally Posted by Kup98ss View Post
    Sorry I hijacked this thread.

    What type of 02's Should I get both front types and back please.
    I just can't find them, and it's probably because I don't know what to look for.
    you just need the front's here is what they look like...http://shop.quicktimeperformance.com...ct_detail&p=21

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