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Thread: 2.5 downpipe in 2.25 swingvalve?

  1. #1
    boostaholic
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    2.5 downpipe in 2.25 swingvalve?

    Thats pretty much my question. I have a 2.5" downpipe off a 89 daytona ES that I would like to use on my 85 laser. Will it fit in the stock swingvalve or no?

  2. #2
    Hybrid booster mo' parts's Avatar
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    Re: 2.5 downpipe in 2.25 swingvalve?

    you'll have to slot the downpipe's flange to fit the older style flange. the bolt pattern is wider on the newer vehicles.

  3. #3
    boostaholic
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    Re: 2.5 downpipe in 2.25 swingvalve?

    That sounds easy enough. As long as the pipe will fit, I should be fine. Thanks

  4. #4
    Hybrid booster Turbo Mopar Contributor Darkapollo's Avatar
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    Re: 2.5 downpipe in 2.25 swingvalve?

    its off by about 1/2'' I did it when i put the Garrett on my T1. its easy.

  5. #5
    boostaholic
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    Re: 2.5 downpipe in 2.25 swingvalve?

    Got it mostly in last night after struggling with a broken bolt on the driver side for about 3 hours. the bolt broke on the downpipe side and there wasn't enough room to push it out the top if i cut it so i had to twist it out with vise grips. unfortunately i ran out of time so my 3" exhaust will have to wait until next weekend. d'oh!

  6. #6
    Hybrid booster
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    Re: 2.5 downpipe in 2.25 swingvalve?

    I did this mod to my 86 Lebaron T1. It was good for about .2 in the 1/8 th
    mile. I got a 2 1/2" downpipe from a turbo Acclaim at the JY for $3.
    1986 Chrysler Lebaron 2 dr. R.I.P. 2.2 T1 log intake, modified to intercool Best 1/8th 9.03@77mph / Best 1/4 14.16@93.55mph Running on E85:nod:[SIGPIC][/SIGPIC] '93 Spirit 2.5 TBI 5 Spd(sold), '85 Ramcharger, 360 4brl, NP435 4 Spd. The new ride; '90 Sundance 2.5 T1/5 spd. FMIC(from Ford Probe) new Mitsu; Best 1/8th 8.96@79.16 / Best 1/4 14.06@101.27

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