Should I replace the Pre-cat with an up pipe?
+ Reply to Thread
Results 1 to 3 of 3

This is a discussion on Should I replace the Pre-cat with an up pipe? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; My CEL came on the other day then turned off on its own then came back on. The next day ...

  1. #1
    Registered User Chalupatke's Avatar
    Join Date
    Nov 2008
    Westchester, NY

    Should I replace the Pre-cat with an up pipe?

    My CEL came on the other day then turned off on its own then came back on. The next day durring normal driving the turbo completely went dead. No pull at all, hiss from the intake or expulsion from the BOV can be heard to confirm this terrible fate. After some trial and error the dealer says the pre cat melted somehow and thats why the turbo isnt spooling. They want over $500 to replace the pre cat. Should I just replace the pre cat with an up pipe? How difficult is it to install?

  2. Remove Advertisements

  3. #2
    Master Baiter EJ257's Avatar
    Join Date
    Aug 2007
    On a stream bank somewhere
    I Support ClubWRX
    Yes - you should not run a catted UP
    2016 Toyota Tacoma TRD Off-Road - Daily
    2005 WRX STi (Mods | Virtual Dyno) - Toy

    Resident Tuner @ WTF Tuning

    "Never trust anything that bleeds for a week and lives ..."


  4. #3
    Join Date
    Jul 2003
    I Support ClubWRX
    So they have determined that the "cat" is clogged or broken up into peices. If it's clogged replace it. If it's broken into little pieces like they've been known to do odds are your turbo is no good either at this point.

    I'd check with your warranty paperwork. In some states the UP/Turbo is considered emission devices and will have a longer warranty.

    I'd personally find someone local who knows Subaru's and ask them to help you install a catless UP into the vehicle. Along with the UP you can do a resistor mod to clear the CEL or get some sort of engine management to defeat the code.
    0-60 faster then your first sexual experience.
    "You've come far, and though you're far from the end
    You don't mind where you are, cause you know where you've been"

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself. We strongly suggest that you stay away from using aol, yahoo, msn, and hotmail accounts. Sometimes the mail server blocks the emails from our server. As a result you will not receive any notifications including the confirmation email.

Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Posting Permissions

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