Results 1 to 19 of 19

high flow cats

This is a discussion on high flow cats within the GTO forums, part of the Vehicle Specific category; my cats are shot.im thinking about putting in a set of magnaflow high flow cats.good idea??and why is it so ...

  1. #1
    Junior Member okay469's Avatar
    Join Date
    May 2010
    Location
    NYC
    Posts
    49

    phantom black
    06 gto

    high flow cats

    my cats are shot.im thinking about putting in a set of magnaflow high flow cats.good idea??and why is it so much cheaper it goin that route then goin and grabbing the stock ones again? I was originally thinkin bout just getting rid of them all together but i dont know how get rid of the rear o2s

  2. #2
    Member 666ws6's Avatar
    Join Date
    Oct 2005
    Location
    Greenville, SC
    Age
    44
    Posts
    427

    NBM
    2000 Trans Am Ws6 #2946

    What makes you think your stock ones are shot? I'm curious, I have that suspiscion about mine due to smell, but I'm not sure how to tell.
    2000 WS6 TA #2946 - A4, Best 1/4: 12.5s @111mph.
    SLP LTs, 228r Cam, SY 3500, Shift kit, LS6 intake, underdrive pulleys, lid, p&p TB, Borla w/ cutout, Pro-kit springs, poly all around, Hotchkis suspension, 3.90 gears, tuned.

  3. #3
    Junior Member okay469's Avatar
    Join Date
    May 2010
    Location
    NYC
    Posts
    49

    phantom black
    06 gto

    CEL light came on i had it checked and my answer was cats. also i dont know if it has to do with the cats but my exhaust on startup has been pretty violent

  4. #4
    cutting and welding mark21742's Avatar
    Join Date
    Mar 2008
    Location
    mercersburg pa
    Posts
    6,443

    hugger orange
    2004

    The hi-flow cats have less plates in them so even new and working the way they should, they can still throw the insufficient catalyst code...if you plan on getting them saveup money to get a tune and have the codes deleted so they won't come on again.
    Biggest reason for the lower price is because they are universal and not a direct fit, so you would need to do some pipe cutting and welding.
    Or you could hollow your stock ones out, get a tune and save the money you would have spent on the cats.

    The stock cats are the triangle shaped boxes, then there is a resonator behind the cat that "looks" like a standard older style cat

  5. #5
    Junior Member okay469's Avatar
    Join Date
    May 2010
    Location
    NYC
    Posts
    49

    phantom black
    06 gto

    thanx mark.can i delete these codes with a predator or do i have to get a custome tune no matter what route i go?if i hollow them out i would still have to delete the rear o2s correct?

  6. #6
    Junior Member Roman nj.'s Avatar
    Join Date
    Oct 2010
    Location
    New Jersey
    Posts
    48

    Impulse Blue
    2004 Pontiac GTO

    i just went with jba catless mids and they sound awsome. the older preditor tuner was able to turn off codes for good but my newer one does not. you can clear the codes but they will return. my buddies older one turned his off for good. i'm trying to find out how i can get my codes off for good also. there might be a way to fool them by putting somthing on the o2's. i read that somewhere but have to find the thread. i know hp tuners can but that is big bucks.

  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    Yah. HPT is alot of moolah. Save up and get the rear O2s tuned out. No more codes.

  8. #8
    Junior Member MNGTO's Avatar
    Join Date
    Apr 2008
    Location
    Minneapolis, MN
    Posts
    58

    Black
    2004 GTO

    I would try to turn them off with your predator, the one that I have will. You are right about deleting your rear o2s if you gut your cats. That will set codes right away.

  9. #9
    Member Eganslp's Avatar
    Join Date
    Oct 2009
    Location
    Philadelphia
    Age
    31
    Posts
    271

    Sunset metallic orange
    '01 Camaro SS

    Hey guys just so yous know when I tried to turn them off my passenger side blew out completely so id advise to keep them on dude or looking for some new o2's and they my friend are expensive like 80 per one and you have 4. I didnt mess with mine either cuz I'm afraid to I just clicked slp tune o2's off and from then on the o2's closest to the rear went and both my high flo cats failed idk y I only clicked off so... I'm just saying def. Read up on it before you do it I guess


    Sent from my iPhone using Tapatalk
    The sound of your piss hitting the urinal.......yea it sounds feminine!

  10. #10
    Junior Member okay469's Avatar
    Join Date
    May 2010
    Location
    NYC
    Posts
    49

    phantom black
    06 gto

    is a possitve or maybe that the high flow cats will throw codes? i was gonna get a tune anyway buy will they tune me with the CEL on for no cats? ive never dealt with tunes before so i have no clue.just trying to get an solution as this all for my inspection lol kinda funny doin all the "wrong things" to pass eh?

  11. #11
    Member derbs's Avatar
    Join Date
    Jun 2006
    Location
    iowa
    Age
    30
    Posts
    276

    IBM
    04 GTO

    Do you have to pass the sniffer??? I've herd stories of High flow cats not passing. If not an all your worried about is a CEL light just call up FROST and get the rears tuned out.

  12. #12
    Junior Member Roman nj.'s Avatar
    Join Date
    Oct 2010
    Location
    New Jersey
    Posts
    48

    Impulse Blue
    2004 Pontiac GTO

    there's a setting on your preditor that sets the temp settings on your o2's. by turning the temp all the way up your computer won't try to cool them with fuel. thats probably why your cats and o2's went bad . well i have no cats maybe the same with the high flows?

  13. #13
    Junior Member okay469's Avatar
    Join Date
    May 2010
    Location
    NYC
    Posts
    49

    phantom black
    06 gto

    well got rid of my cats today. ill be getting a tune later this week. cant wait to see the results of the tune. im pretty damn loud now with no cats and no mufflers i hope the coppers dont get any ideas

  14. #14
    Member derbs's Avatar
    Join Date
    Jun 2006
    Location
    iowa
    Age
    30
    Posts
    276

    IBM
    04 GTO

    I'm running long tubes, no cats and the slp loudmouth 1 it's just the way I like it. I did get a compliment from a chief of police (He's family) That liked they way it sounded.
    Last edited by derbs; 11-06-2010 at 08:33 PM.

  15. #15
    Junior Member okay469's Avatar
    Join Date
    May 2010
    Location
    NYC
    Posts
    49

    phantom black
    06 gto

    hey derbs still got the resonators in there?? i was thinkin bout takin that out too considerin i lack the rest of an exhuast system lol

  16. #16
    Member derbs's Avatar
    Join Date
    Jun 2006
    Location
    iowa
    Age
    30
    Posts
    276

    IBM
    04 GTO

    Yea I still the shot gun mufflers.

  17. #17
    Auto Painter RyanJM's Avatar
    Join Date
    Dec 2007
    Location
    Houston, TX
    Age
    41
    Posts
    2,002

    White
    1998 Trans Am

    Some high flow cats will set off the rear 02 sensor codes and some won't. Best to have them tuned out if not place like ws6store.com and other sell plug in 02 sims to get rid of the light. I have my rears tuned out since I have lt's and a ory but I am waiting to see what it sound like monday with it's new cam. I may weld in some magnaflow bullet cats like kooks uses on their ypipe.
    1998 Trans Am 85k miles.
    Bolt ons, MS3 113LSA cam, Circle D Stall, Tune, Modified WS6 style hood, Full Suspension, 6000k HID's, Clear Side Markers w/ Leds, Led 3rd Brake Light and 18" AR Staggered Killer Wheels w/ BFG KDW NT's.- Weekend Toy/DD
    02 Trailblazer -Sold
    09 Ram 1500 CC - Sold
    09 Cobalt SS/TC - Sold
    13 ram 1500 LoneStar CC 4x4 - Magnaflow, K&N,and more to come-DD/Toy

  18. #18
    Member Eganslp's Avatar
    Join Date
    Oct 2009
    Location
    Philadelphia
    Age
    31
    Posts
    271

    Sunset metallic orange
    '01 Camaro SS

    Quote Originally Posted by Roman nj. View Post
    there's a setting on your preditor that sets the temp settings on your o2's. by turning the temp all the way up your computer won't try to cool them with fuel. thats probably why your cats and o2's went bad . well i have no cats maybe the same with the high flows?
    Ahh yes good call cuz now that I remember it was set to 1085*c I think so that's prolly pretty hot right?


    Sent from my iPhone using Tapatalk

  19. #19
    Junior Member Roman nj.'s Avatar
    Join Date
    Oct 2010
    Location
    New Jersey
    Posts
    48

    Impulse Blue
    2004 Pontiac GTO

    yea pretty hot. i think it goes up to like 1200 max. your cats probably burnt. you wouldn't think they would use fuel for cooling.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Where to get high flow cats?
    By meadowz06 in forum External Engine
    Replies: 12
    Last Post: 10-07-2010, 04:01 PM
  2. high flow cats?
    By Devildog in forum External Engine
    Replies: 5
    Last Post: 04-02-2008, 03:10 AM
  3. High Flow Cats
    By silverado777 in forum GM Trucks
    Replies: 2
    Last Post: 11-20-2007, 03:50 PM
  4. Cats? No Cats? High Flow Cats??
    By lx24 in forum Firebird / WS6
    Replies: 2
    Last Post: 08-17-2007, 09:11 PM
  5. High flow cats
    By GLUMAKER in forum General Help
    Replies: 2
    Last Post: 04-09-2006, 08:42 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •