Straight Piped Catalytic Converter: 03 F-250 5.4

Discussion in 'Ford Trucks' started by Cadamjones94, Feb 11, 2020.

  1. Cadamjones94

    Cadamjones94 Junior Member
    Messages: 1

    I'm new to all of this I have a 01 f250 5.4l if I remove the cat will my check engine light come on ?
  2. Daley Construction

    Daley Construction Member
    from Airdrie
    Messages: 42

    I went through this with my 2010 5.4l F250 this fall. The engine would have been on constant for me and the biggest reason I spent the coin on new cats was my mechanic and the muffler shop told me the engine sound in the truck would have been really bad. Not just loud but not a nice sound.
  3. Sawboy

    Sawboy Addict
    Messages: 1,890

    Removed both cats, still has a muffler on my 05, 5.4. No CEL, and it sounds fine.
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 13,558

    Aren't you fighting hearing loss?
    Sawboy likes this.
  5. cwren2472

    cwren2472 PlowSite Fanatic
    Messages: 7,687

    dieselss likes this.
  6. jdsquire

    jdsquire Senior Member
    Messages: 149

    I removed the cat on my ‘99 5.4, no cel. There’s a gasket between the cat and Y pipe, I used that as a pattern to make the flange for the straight pipe into a muffler.
  7. FordFisherman

    FordFisherman Addict
    from 06611
    Messages: 1,752

    Isn’t there a small area on the y pipe that chokes the exhaust on the 5.4?