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Buick Forum: What size pipe?
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Thread: What size pipe?

  1. #1
    danadalaw1978 is online now Full Member My Buick(s): '96 Roadmaster Collector's Edition
    Join Date
    Mar 2013
    Rep Power

    What size pipe?

    I'm finally going to pull my engine and replace the leaking rear main and do some other stuff. Since I'm getting the pcm redone and deleting the emissions, I'm going to go ahead and cut off the CATs to make pulling the engine easier. I need to know what size pipe is before the CATs so I can get an adapter to put on 2 1/2" exhaust with an x-pipe and flowmaster 40 series mufflers. Eventually I plan on getting headers, but for now, this will have to do.

  2. #2
    Join Date
    Oct 2009
    Rep Power

    Re: What size pipe?

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    why do you want to install a barn door in the middle of the exhaust flow? cause that is what a flowcrapper is , a $20 turbo muffler flows more than a flowmaster. and the down pipe is about 1 7/8s or 2 inches .
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    1992 B4C 1LE camaro 5.0 5 speed
    1993 Roadmaster wagon
    2000 Chevy Tahoe limited
    2014 F150 5.0

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