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Who has their cats removed on their 99+

This is a discussion on Who has their cats removed on their 99+ within the Exhaust forums, part of the Performance category; Reason I ask is because on a 96 mustang I owned once I removed the cats it seemed like I ...

  1. #1
    Banned
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    Who has their cats removed on their 99+


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    Reason I ask is because on a 96 mustang I owned once I removed the cats it seemed like I kept having problems with my EGR valve my IAC and a few other things kept throwing a engine code.

    Even after a I had it dyno tuned.

    So if you have your cats removed did you notice any problems or what not?

    Also if any of you live in cali, how did you pass smog?

  2. #2
    Registered User
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    Re: Who has their cats removed on their 99+

    I am not running a cat on my 95 and haven't had any problem what so ever. sorry didn't see the 99+ part. A couple o2 somulators and you should be fine.

    Jason
    Last edited by indigo blue gmc; 12-20-2006 at 02:03 PM.
    95 GMC Z71, K&N aircharger offroad kit, 285's, msd ignition, #280 flex-a-lite fans, CFM spacer & fuel pressure reg, underdrive pulleys, 14 sf, detriot trutrac


  3. #3
    RBz OFFROAD
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    Re: Who has their cats removed on their 99+

    With O2 simulators you wont have any problems for sure. Or you could get a pcm tune and get the rear o2 sensors deleted. If you dont do either it will throw a code and make the motor run a little rich but nothing serious. My friend has ahd his cats off of his o2 for a year or so and hasnt had any problems do to it just the light on.
    -2003 GMC ECSB 2500HD 4x4 496 8.1L, Allsion, Volant CAI, Helix Power Tower, Granatelli MAF, Dual 3" w/ X-pipe no mufflers/no cats,3" PA BL, 8" Fabtech, Custom Steering with 3/4 Heims, 42 TSL SX IIs, 20x10 MT Classic IIs.

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