4.1L.. What's the problem? - Page 2
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HT4100 4.1, 4.5, 4.9 Discussion, 4.1L.. What's the problem? in Cadillac Engine Discussion; What size is our stock catback? 2.25? 2.5? I know our cat is 2.25"...
  1. #16
    BlackTTC6 is offline Cadillac Owners Member
    Automobile(s): 1987 Seville
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    Re: 4.1L.. What's the problem?

    What size is our stock catback? 2.25? 2.5? I know our cat is 2.25"


  2. #17
    caddeville's Avatar
    caddeville is offline Cadillac Owners Enthusiast
    Automobile(s): 1991 Deville / 1989 BMW 635csi
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    Re: 4.1L.. What's the problem?

    I'm pretty sure it is 2.25", measure it.

  3. #18
    BlackTTC6 is offline Cadillac Owners Member
    Automobile(s): 1987 Seville
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    Thread Starter

    Re: 4.1L.. What's the problem?

    I'll find out next week. I ordered a 2.5" muffler. I figure going to a slightly larger pipe won't matter.

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