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Last Post 31 Mar 2015 06:41 PM by  twin_turborx7
T4 questions - Header / Cat removal
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New Member
New Member

18 Mar 2015 10:51 AM
    The rules state that in T4 we can remove the Cat from the header by replacing it with a pipe of equal inlet and outlet.

    My Scion FRS has a catted OEM header. Does this mean we have to resort to welding a pipe in place of the header or are there other options?

    Advanced Member
    Advanced Member

    19 Mar 2015 04:53 PM
    simplest thing to do is take a metal rod and knock out the cat matrix and use the stock header
    Veteran Member
    Veteran Member

    31 Mar 2015 06:41 PM
    You can also submit a letter asking for a different part, clarification or allowing an alternate header for you car.

    Letter can be submitted at
    You are not authorized to post a reply.

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