1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

gutting rear cats?

Discussion in 'Performance and Tuning' started by justin14200, Sep 15, 2010.

  1. Sep 15, 2010 at 10:05 AM
    #1
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock
    anyone have a how to? i wanna keep the look of having cats on the truck...

    anyone have any ideas of an easy way to gut the rear cats without firing up the torch and cutting up my new truck?
     
  2. Sep 15, 2010 at 10:27 AM
    #2
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock
    do they bolt on?
     
  3. Sep 15, 2010 at 10:41 AM
    #3
    Chachie

    Chachie Well-Known Member

    Joined:
    Dec 23, 2009
    Member:
    #28047
    Messages:
    1,852
    Gender:
    Male
    First Name:
    Justin
    Nor Cal
    Vehicle:
    '06 TRD OR, 4x4, Auto, 6" Fabtech, 35's
    Locker mod, Anytime fog mod, always 400w mod.
    Better yet, get a set of DT short tubes and stay legal and have more power.
     
  4. Sep 15, 2010 at 10:47 AM
    #4
    OH-MAN

    OH-MAN Well-Known Member

    Joined:
    Apr 23, 2009
    Member:
    #16324
    Messages:
    2,263
    Gender:
    Male
    First Name:
    Steve
    Sunny Az.
    Vehicle:
    10 4X4 O.R. White
    TRD skid painted black,
    I am using a set of URD pipebomb pipes.
    They have a big round thing on each side that looks like a cat.
    The o2 sensors are in front of them so no codes have shown.
    So I have a better flowing exhaust and still save the planet while getting 18 mpg!!!!!
     
  5. Sep 15, 2010 at 10:50 AM
    #5
    whippersnapper02

    whippersnapper02 Well-Known Member

    Joined:
    Dec 20, 2009
    Member:
    #27905
    Messages:
    35,266
    Gender:
    Male
    First Name:
    Christian
    Yorba Linda, CA
    Vehicle:
    10 MGM TRD OR 4wd Auto DCSB
    Banks Monster Exhaust, Pop n Lock tailgate lock, Hook-Ups tie down brackets, USA Spec Ipod adaptor, WO seat covers, color matched grill with Grillcraft insert, Tuffy locking bed box
    High flow cats are a joke. The only reason people think they are super high flow is because they replace a severely clogged cat with a high flow and think OMG they really worked. The truth is modern cats aren't all that restrictive. Yeah you gain power by removing them but all you gain is top end power and you lose low end power.
     
  6. Sep 15, 2010 at 10:56 AM
    #6
    whippersnapper02

    whippersnapper02 Well-Known Member

    Joined:
    Dec 20, 2009
    Member:
    #27905
    Messages:
    35,266
    Gender:
    Male
    First Name:
    Christian
    Yorba Linda, CA
    Vehicle:
    10 MGM TRD OR 4wd Auto DCSB
    Banks Monster Exhaust, Pop n Lock tailgate lock, Hook-Ups tie down brackets, USA Spec Ipod adaptor, WO seat covers, color matched grill with Grillcraft insert, Tuffy locking bed box
    What year stang? I'm thinking most gains were from the non stock H pipe.
     
  7. Sep 15, 2010 at 11:03 AM
    #7
    whippersnapper02

    whippersnapper02 Well-Known Member

    Joined:
    Dec 20, 2009
    Member:
    #27905
    Messages:
    35,266
    Gender:
    Male
    First Name:
    Christian
    Yorba Linda, CA
    Vehicle:
    10 MGM TRD OR 4wd Auto DCSB
    Banks Monster Exhaust, Pop n Lock tailgate lock, Hook-Ups tie down brackets, USA Spec Ipod adaptor, WO seat covers, color matched grill with Grillcraft insert, Tuffy locking bed box
    Wow. Poor Stang. I think I would have sold that car within the Mustang community but you never know what anyone will do with it. Sounds like the kid's parents paid for it.
     
  8. Sep 15, 2010 at 7:47 PM
    #8
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock
    Well, inspection isn't a big deal. I've seen people cut them off before... I've also Sean people cut them open... And take a hammer and prybar to them...
     
  9. Sep 16, 2010 at 7:49 AM
    #9
    macgyver

    macgyver Well-Known Member

    Joined:
    Aug 14, 2009
    Member:
    #21173
    Messages:
    3,607
    Gender:
    Male
    First Name:
    Brad
    Canton, GA
    Vehicle:
    '13 Tundra double cab SR5 4x4
    Pointless on a tacoma.

    Now on a high performance vehicle...Yes.

    I used to have a turbocharged honda accord before my tacoma and I actually didn't run a cat on it. 2.5" exhaust from the turbo back to the muffler. Surprisingly I was able to pass legitimately without one, gotta love OBD2 and the guy not doing a visual inspection because the car was too low to look under.
     
  10. Sep 16, 2010 at 8:12 AM
    #10
    Toyotacrawler

    Toyotacrawler She's got the jimmy legs

    Joined:
    Aug 19, 2010
    Member:
    #41911
    Messages:
    3,113
    Gender:
    Male
    First Name:
    Mike
    Cusseta/Opelika AL
    Vehicle:
    2010 Tacoma DC TRD Sport
    Blacked out Badges, Rear Leaf TSB(if that counts as a mod), Bed Mat, WeatherTech's, Bilstein 5100 in the front set to 1.75" K&N Drop in
    I use to own a 01 Tacoma. I live in alabama where there are little if any laws on emissions. So after I installed the header from downey I cut the first one off. No real issues other than the check engine light was always on. The code read backflow pressure below threshold in bank one. Well, I got use to that and could deal with it. A few years later I had issues with the second cat and ended up cutting it completely off. I noticed NO power gain whatsoever. All I noticed was that the truck was ridiculously loud!! If I had to do it all over again I would have never cut the first one off in the first place. Leave it on, it's there for a reason, not mention it helps protect the environment. Spend the money and get a high flow cat. Thats just my $0.02 anyway. :)
     
  11. Sep 16, 2010 at 10:24 AM
    #11
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock
    im also planning on doing a volant intake. if i did cut them off, would the intake make more backpressure on the exhaust to make it like the same pressure if they were there?

    i know another guy on here cut his off and did an aeroturbine 2525xl and it sounded great, idk if he had problems with backpressure or not... what problems would u have if backpressure was incorrect?
     
  12. Sep 16, 2010 at 10:38 AM
    #12
    whippersnapper02

    whippersnapper02 Well-Known Member

    Joined:
    Dec 20, 2009
    Member:
    #27905
    Messages:
    35,266
    Gender:
    Male
    First Name:
    Christian
    Yorba Linda, CA
    Vehicle:
    10 MGM TRD OR 4wd Auto DCSB
    Banks Monster Exhaust, Pop n Lock tailgate lock, Hook-Ups tie down brackets, USA Spec Ipod adaptor, WO seat covers, color matched grill with Grillcraft insert, Tuffy locking bed box
    That article left out that low RPM backpressure promotes exhaust scavenging. At high RPM the exhaust pulses are so strong and happen so fast that scavenging is not needed.
     
  13. Sep 16, 2010 at 10:51 AM
    #13
    memario1214

    memario1214 Vivid Illumination Vendor

    Joined:
    Oct 1, 2009
    Member:
    #23628
    Messages:
    12,981
    Gender:
    Male
    First Name:
    Colton
    MT recently relocated to Willmar, MN
    Vehicle:
    05 Dub Cab TRD Sport 4x4
    TRD Cold Air Intake, rear cat delete with Aero Turbine 2525, Maglite mount mod, white LED's all around, white gauges w/blue needles, Tinted Tails, Morimoto 32" XBAR LED Bar, Truxedo Lo-Pro QT Tonneau, Pioneer AVIC X-920 BT touchscreen, FX-R Retrofit, LR UCAs, OME 3" Lift w/ Dakar leafs, DTLT Headers, Walbro 255 fuel pump, TRD S/C, Hankook Dynapro ATM tires
    Justin, you may be talking about me. I did in fact remove my rear cats and put in an AT as well as a resonator. I did lose some low end torque, but the truck runs quite a bit better now though.
     
  14. Sep 16, 2010 at 10:59 AM
    #14
    Toyotacrawler

    Toyotacrawler She's got the jimmy legs

    Joined:
    Aug 19, 2010
    Member:
    #41911
    Messages:
    3,113
    Gender:
    Male
    First Name:
    Mike
    Cusseta/Opelika AL
    Vehicle:
    2010 Tacoma DC TRD Sport
    Blacked out Badges, Rear Leaf TSB(if that counts as a mod), Bed Mat, WeatherTech's, Bilstein 5100 in the front set to 1.75" K&N Drop in
    I had an injen intake (see pics in my gallery if you like :) ) and my check engine light still stayed on. I never had any mechanical issues with the backpressure below threshold, nor do I know if I was creating any problems for the future. I was told by a shop that I could have the computer reprogrammed but I never did any of that mess. I shoulda left it the way it was or bought a high flow.
     
  15. Sep 16, 2010 at 1:07 PM
    #15
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock
    Yea, I think it probobly was you. How did you gut your cats? You lost power when you did it? If I just put on the muffler, will I get the same deep sound as if I cut the cats out?
     
  16. Sep 16, 2010 at 1:27 PM
    #16
    memario1214

    memario1214 Vivid Illumination Vendor

    Joined:
    Oct 1, 2009
    Member:
    #23628
    Messages:
    12,981
    Gender:
    Male
    First Name:
    Colton
    MT recently relocated to Willmar, MN
    Vehicle:
    05 Dub Cab TRD Sport 4x4
    TRD Cold Air Intake, rear cat delete with Aero Turbine 2525, Maglite mount mod, white LED's all around, white gauges w/blue needles, Tinted Tails, Morimoto 32" XBAR LED Bar, Truxedo Lo-Pro QT Tonneau, Pioneer AVIC X-920 BT touchscreen, FX-R Retrofit, LR UCAs, OME 3" Lift w/ Dakar leafs, DTLT Headers, Walbro 255 fuel pump, TRD S/C, Hankook Dynapro ATM tires
    I didn't gut the cats though... I cut them clean out! Haha and you should get about the same sound if you were to add in like a 10 or 12 inch resonator. Don't go for the xl, you will find yourself paying $100 for a $30 part.
     
  17. Sep 16, 2010 at 5:45 PM
    #17
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock

    what is your exact setup? your truck sounds amazing.

    do you have pictures of the underside of your truck that you would share?

    the 2525xl is only $120 on ebay. whats the purpose of the resonator, whats it do?
     
  18. Sep 16, 2010 at 7:39 PM
    #18
    memario1214

    memario1214 Vivid Illumination Vendor

    Joined:
    Oct 1, 2009
    Member:
    #23628
    Messages:
    12,981
    Gender:
    Male
    First Name:
    Colton
    MT recently relocated to Willmar, MN
    Vehicle:
    05 Dub Cab TRD Sport 4x4
    TRD Cold Air Intake, rear cat delete with Aero Turbine 2525, Maglite mount mod, white LED's all around, white gauges w/blue needles, Tinted Tails, Morimoto 32" XBAR LED Bar, Truxedo Lo-Pro QT Tonneau, Pioneer AVIC X-920 BT touchscreen, FX-R Retrofit, LR UCAs, OME 3" Lift w/ Dakar leafs, DTLT Headers, Walbro 255 fuel pump, TRD S/C, Hankook Dynapro ATM tires
    Here is my thread that tells everything about my build up to this point. Except I don't think that I have my resonated videos in there, they are in my sig. Pictures and everything should be in there though. If not, they lie in my gallery. Aero Turbine Thread

    What a resonator does is eliminate some of the "wild" sounds that come from the engine. It muffles the sound waves that are coming at it. In my case, I used that resonator to take out the little bit of rasp that I was experiencing at about 2300RPM
     
  19. Sep 17, 2010 at 11:07 AM
    #19
    justin14200

    justin14200 [OP] frequent reader

    Joined:
    Mar 22, 2010
    Member:
    #33732
    Messages:
    173
    Gender:
    Male
    First Name:
    justin
    baton rouge
    Vehicle:
    2010 prerunner sr5 bsp
    stock

    soo u have a 2525 and a resnator? not a 2525xl?

    wouldnt a 2525xl be the same as a 2525 and a resonator?
     
  20. Sep 17, 2010 at 11:23 AM
    #20
    memario1214

    memario1214 Vivid Illumination Vendor

    Joined:
    Oct 1, 2009
    Member:
    #23628
    Messages:
    12,981
    Gender:
    Male
    First Name:
    Colton
    MT recently relocated to Willmar, MN
    Vehicle:
    05 Dub Cab TRD Sport 4x4
    TRD Cold Air Intake, rear cat delete with Aero Turbine 2525, Maglite mount mod, white LED's all around, white gauges w/blue needles, Tinted Tails, Morimoto 32" XBAR LED Bar, Truxedo Lo-Pro QT Tonneau, Pioneer AVIC X-920 BT touchscreen, FX-R Retrofit, LR UCAs, OME 3" Lift w/ Dakar leafs, DTLT Headers, Walbro 255 fuel pump, TRD S/C, Hankook Dynapro ATM tires
    Essentially the same thing yes. But you don't get to pick the length of the resonator.
     
To Top