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  1. CEL with code P0421. Its a failing Catalytic convertor

    Started by Dk_krypton, 12-15-2016 02:47 PM
    aftermarket, catalytic converter, headers, repair, replacement
    • Replies: 12
    • Views: 5,004
    Last Post: 12-31-2016 12:08 AM
    by Dk_krypton  Go to last post

    Forum:
    Problems with the Mazda3

  2. Vibrant Headers CEL and fuel efficiency issue

    Started by Adamo23, 08-20-2012 02:13 AM
    cel, exhaust, fuel consumption, headers, vibrant
    • Replies: 4
    • Views: 3,769
    Last Post: 08-20-2012 11:25 AM
    by thanu31  Go to last post

    Forum:
    Performance

  3. 2004 Mazda 3 GX Header Issue

    Started by JSharrmz, 07-16-2012 12:23 AM
    aftermarket, fuel efficiency, headers, o2 censor
    • Replies: 4
    • Views: 2,797
    Last Post: 09-04-2012 01:44 PM
    by CH0SiiN1  Go to last post

    Forum:
    Performance

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