• Welcome to SVTPerformance!

Help on headers

Discussion in 'SVT Shelby GT500' started by Fang, Mar 13, 2017.

  1. Fang

    Fang Active Member Established Member

    Messages:
    2,085
    Joined:
    Apr 1, 2003
    Location:
    Colorado
    So I have the Lethal offroad x pipe and some Borla axle backs. Thinking of going to headers but want to make sure I can bolt up by my stock cats to them. Any particular set up that I need to stick with? Thanks.
     
  2. HillbillyHotRod

    HillbillyHotRod Hooligan rabble rouser Established Member

    Messages:
    2,156
    Joined:
    Jan 9, 2014
    Location:
    Ozarks of Arkansas
    If going to LT headers I believe you would have to get a muffler shoe fab something up if you want to keep the stock cats. Totally different connection system.
     
  3. Sonic 03 Cobra

    Sonic 03 Cobra Yes, that's a 2011 Established Member

    Messages:
    1,060
    Joined:
    Jun 16, 2002
    Location:
    Philadelphia, PA
    Yes you would need someone to fab that.
     
  4. 1st usa car

    1st usa car Active Member Established Member

    Messages:
    519
    Joined:
    Jan 28, 2015
    Location:
    JAX Florida
    You are wasting your time and money if you get headers and dont get LT headers... and if you get them and add cats.... what is the point???
     
  5. Fang

    Fang Active Member Established Member

    Messages:
    2,085
    Joined:
    Apr 1, 2003
    Location:
    Colorado
    I will need to get emissions soon and wanted the option to switch it over when that happens. I know the headers are a pain to put in. Thought it would be easier to just swap out the mid pipe then do the test, then go back.
     
    lexustech48 likes this.
  6. 1 Alibi 2

    1 Alibi 2 If not today, when ?????? Established Member

    Messages:
    1,886
    Joined:
    Aug 27, 2011
    Location:
    Hackettstown, N.J.
    Run Kooks LT's, " green " catted X pipe, & stock mufflers on both cars.
    N.J. is an inspection state, plugs into the OBDII port to verify everything is enabled........no tailpipe sniffer.
    I do nothing to the car for inspection, as the 02's are turned on & it throws no codes.
     
  7. Fang

    Fang Active Member Established Member

    Messages:
    2,085
    Joined:
    Apr 1, 2003
    Location:
    Colorado

    They are sniffing here....
     
  8. Pribilof

    Pribilof 5,280 Reasons to Mod Established Member

    Messages:
    546
    Joined:
    Oct 15, 2013
    Location:
    Denver
    Fang, I haven't gone to LTs for precisely this reason. I haven't been able to confirm with anyone that they have passed a sniffer test with LTs and green cats. I hate our inspection system here. I do not trust minimally paid state employees to drive my cars on dynos to run the sniffer.
     
    Fang likes this.
  9. 1 Alibi 2

    1 Alibi 2 If not today, when ?????? Established Member

    Messages:
    1,886
    Joined:
    Aug 27, 2011
    Location:
    Hackettstown, N.J.
    Contact Kooks, the green cats are supposed to be 49 state legal.
     
  10. PaxtonShelby

    PaxtonShelby 5.4 3-valve sucks big hairy donkey balls Established Member

    Messages:
    3,732
    Joined:
    Nov 16, 2010
    Location:
    Pittsburgh, PA
    With LT headers...does anyone know the average HP difference between high flow cats and an off road pipe on an otherwise identical stock-ish car?
     
  11. RBB

    RBB Well-Known Member Established Member

    Messages:
    915
    Joined:
    Jul 3, 2013
    Location:
    Stephens City, VA
    I run Stainless Works headers and have some catted lead pipes that I swap on whenever I have to pass emissions. Soon as I'm done, I bring it back home and put the catless leads back on. No big deal, takes literally 15 minutes to get under the car and do it. Might be something you want to look in to.
     
    lexustech48 likes this.
  12. TheGovernment

    TheGovernment Member Established Member

    Messages:
    200
    Joined:
    Jul 12, 2014
    Location:
    Canada
    I just bought some Dynatech LT's and catless pipe. If i ever have any issues, I'll buy a catted one and swap them like RBB.
     
    lexustech48 likes this.
  13. Zedeater

    Zedeater Good from far Established Member

    Messages:
    267
    Joined:
    Jul 13, 2016
    Location:
    Oh Canada!
    Did you have any mods to your exhaust done already? I think we're local and I'd love to hear before & after!
     
  14. TheGovernment

    TheGovernment Member Established Member

    Messages:
    200
    Joined:
    Jul 12, 2014
    Location:
    Canada
    Me? Or the op?
     
  15. Zedeater

    Zedeater Good from far Established Member

    Messages:
    267
    Joined:
    Jul 13, 2016
    Location:
    Oh Canada!
    I'm talking to you TheGovernment
     
  16. sleek98

    sleek98 Well-Known Member Established Member

    Messages:
    1,458
    Joined:
    Nov 19, 2012
    Location:
    Kansas City, MO
    Do you have any pictures on them installed, looking for steering shaft and frame rail clearance. I am deciding between Kooks and Dynatechs. I think I want to go with the kooks but have read that some guys had to cut off a bolt head on the oil cooler. Did your installer (or yourself) have any issues like that?
     
  17. 1 Alibi 2

    1 Alibi 2 If not today, when ?????? Established Member

    Messages:
    1,886
    Joined:
    Aug 27, 2011
    Location:
    Hackettstown, N.J.
    .
    I don't have any pics showing the area you're interested in.
    The headers were installed @ my tuner's shop www.teamjdm.com pretty sure no bolt heads were cut off.
     
  18. Pribilof

    Pribilof 5,280 Reasons to Mod Established Member

    Messages:
    546
    Joined:
    Oct 15, 2013
    Location:
    Denver
    Tell me about the test in Virginia. Tailpipe sniffer? Two speed idle? Dyno? OBD2 only? The VA DMV website is non-committal to what one might encounter. They seem to imply one could get one or all of the above tests. Thanks
     
  19. RBB

    RBB Well-Known Member Established Member

    Messages:
    915
    Joined:
    Jul 3, 2013
    Location:
    Stephens City, VA
    It depends on your county. Most counties in VA only do a visual inspection, which is what we have where I live. When you get a little closer to DC, they actually have emissions tests (sniffers, OBD, etc), which vary by the county. There's not just one standard for the entire state.
     
  20. OldYeller

    OldYeller Member Established Member

    Messages:
    119
    Joined:
    Apr 19, 2014
    Location:
    Idaho
    I just finished up kooks 1 7/8 on my 2011. They cleared the oil cooler bolt by a small margin but it's still clear of it. The updated instructions included with the headers made no mention of having to grind it down either. No issues with fitting the stock steering shaft back through.
     

Share This Page