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  1. Anyone else have Catalytic issues?

    Hi everyone, I'm new here and I would appreciate some thoughts on my Mustang GT issue. I have a 2008 with the 4.6, 57,000 miles. I still have factory warranty (preowned but Ford certified) as well as an extended warranty thru another company. I have had no issues with her since I bought her...
  2. Installing Catalytic after mid-pipe?

    2005-2010 Mustang GT Tech
    I have stainless steel headers and h-pipe with no catalytic converters. It's inspection time and I want to pass with no problems. I want to put the catalytic converters after the h-pipe because I will be getting rid of it for a turbo system. I also think it will be much easier to install in the...
  3. 1990 5.0 idles very poorly, doesn't sound right and smells...

    5.0L Tech
    My 5.0 is having some problems. Yesterday I drove it for about 3 hours straight and it ran perfectly fine the whole time. I got home and the car sat for about an hour, then I started it up and took off to get some dinner. The car ran fine still. Then, upon leaving the restaurant, I started my...
  4. 1998 mustang Pre-cat removal

    V6 Tech
    I just bought a mac catback exhaust for my 3.8 and I want it to have some flow. I live in california and i just bought a '98 gt with the pre-cats removed. Will a muffler shop remove my pre-cats? will the police ream me if they pull me over? Thanks!! -Ben
  5. Question reguarding my catalytic converters ,2003 Mustang GT

    4.6L Tech
    i want to take out last cat's in each exhaust line on my mustang. its pretty much a stock GT mustang with 2 flowmaster 40's that drop off before the axle.i was wondering if there are going to be any problems after i take them out. like future smog ploblems and stuff like that. any ideas?