Magnaflow Cats or Cat delete and tune ?

Lincoln LS

  1. Carl Smith

    Carl Smith Active LVC Member

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    My state doesn't have any emission inspections and likely not to for the foreseeable future. I know the performance benefits of removing the converters, but like to hear of some feedback of anyone how has followed by a proper tune.
     
  2. joegr

    joegr Dedicated LVC Member

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    If your cats are good, I doubt there is any measurable performance change to remove them.
     
  3. Carl Smith

    Carl Smith Active LVC Member

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    They are not and throwing codes for both. The delete and tune would be cheaper, but wanted some feeback from some who may have went that route. I may just spend some extra and get the Magaflows but never having to deal with them again is a nice option as well
     
  4. lincoln_zero

    lincoln_zero Dedicated LVC Member

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    So I have had a bit of experience with the LS mods. I'll help you out as best I can.

    Sound:
    Deleting anything, will get you mad droning. The 3.9 in these cars is an exotic sounding motor, so it needs the right exhaust. In my experience, Magnaflow cat-back sounds amazing, tho a little quiet. I haven't heard Magnaflow cats, but I'd imagine they would sound good. Magnaflow has impressed me, I have personally called them and spoken with their technicians. They get it, they know how to make this motor sound a bit less euro and more American.

    So to answer your question: Magnaflow cats is a better option than cat delete.






    Performance:
    Both the first gen and second gen have lackluster exhausts. On the first gen, your whole tail pipe is made up of 2" from the cat back. The LS wants 2-1/4 to 2-1/2 (depending on your Tune and mods). Just doing the exhaust on my (former) 2002 1st gen, I got more torque. Much more torque. I did Magnaflow cat back with X pipe 2-1/4".

    For those with 2nd Gens:
    After the cats you are 2-1/4", but after the resonators you are 2". Can confirm.

    Tune:
    I would recommend Torrie tunes
    Unleashed Tuning - Horsepower is easy, traction is the real problem!

    My Old Build:
    So my first LS, 2002-V8, ran the Magnaflow Cat-Back 2-1/4" w/Xpipe, Rob (KBX) Eco/Track Tune files loaded with Xcal tuner, and a CAI/Nitrous ported built by SPSully.
    KBX no longer exists. So Torrie is your go to tuner guy. A lot of members here swear by his tunes.

    Cheers
     
    Last edited: Jun 5, 2019
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    • jjcool00

      jjcool00 Dedicated LVC Member

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      Had Magnaflow cats, no performance differences that I could see, however the real benefit is the cost. My cat was shot due to misfires and had to be replaced. Rather than spend 1k on OEM cats, I spent $200 on Magnaflow cats.
       
    • lincoln_zero

      lincoln_zero Dedicated LVC Member

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      There shouldn't be, due to needed back pressure. But high flow cats for tuned LS's will make a difference, and as well, forced induction.
       
    • FDR

      FDR Dedicated LVC Member

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      No



      Scavenging is the effect lost with larger/open exhaust, not back pressure
       

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