1. Welcome to Tundras.com!

    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 Tundra discussion topics
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Exhaust

Discussion in 'Performance and Tuning' started by YOTA2015, Apr 28, 2016.

  1. Apr 28, 2016 at 5:11 AM
    #1
    YOTA2015

    YOTA2015 [OP] New Member

    Joined:
    Jan 3, 2016
    Member:
    #2369
    Messages:
    12
    Gender:
    Male
    First Name:
    Tyler
    Vehicle:
    2015 tundra sr double cab 2wd
    Stock
    Was looking at my truck exhaust and I see that there are 4 cats on it and the 02 sensors are in between the two on each side I was curious if I cut the back ones off would it throw a code or would it cause me to fail an emission test or would it be fine?
     
  2. Apr 28, 2016 at 6:15 AM
    #2
    14burrito

    14burrito New Member

    Joined:
    Dec 14, 2014
    Member:
    #798
    Messages:
    172
    Pre cat measures your air fuel ratio and post cat measures catalyst efficiency ....so yes a code would be thrown
     
  3. Jun 9, 2016 at 3:15 PM
    #3
    dirtydeeds

    dirtydeeds New Member Vendor

    Joined:
    Dec 19, 2015
    Member:
    #2282
    Messages:
    181
    Gender:
    Male
    First Name:
    Keith
    Vehicle:
    2003 and 2013 tundra
    more than I can list here
    won't throw a code, and unless you're in Commufornia you'd probably be fine with emissions.

    That said, it would only be for sound. There is no benefit to removing em.

    How many miles on your truck?
     
  4. Jun 9, 2016 at 3:29 PM
    #4
    trayday

    trayday New Member

    Joined:
    Apr 17, 2016
    Member:
    #3163
    Messages:
    156
    Gender:
    Male
    Vehicle:
    2015 limited CM
    7" BDS w/Bilstein 5100s, 20" Fuel Mavericks, 35x12.5 Nitto Terra Grapplers, Magnaflow 50 series muffler, Modiefied intake box w/AFE dry filter, PIAA super white bulbs, N-Fab steps, TRD Rear Sway Bar, Hypertech calibrator, TRD Pro shift knob
    My last car had 4 cats with 4 sensors, the rear 02 sensors were in front of the secondary cats. I replaced the secondary cats with test pipes and occasionally my check engine light would come on, I would just clear with my scanner. After the cat delete I noticed that my rpm's would rev faster and the acceleration of my higher speeds definitely improved.
     
    Last edited: Jun 9, 2016
To Top