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    Supercharger, turbo, whats best?

    I have a 97 expy 5.4l and I would like more power. I hate when little 4cyl hondas line up beside me and beat me in acceleration. I have a K&N air intake, tornado, glass pack exhaust, and a electronic shift improver. All of this has helped some but I want more. I was thinking of a programmer but...
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    Exhaust Manifold

    Has anyone replaced the exhaust manifold with an upgraded one? Or has anyone put headers on their expedition? Let me know if it helped any. Thanks
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    Exhaust

    I would like to run a new exhaust on my 97 exp. I have a glass pack on it now but id like to do more. I would like to get rid of the four cats and run a new h-pipe. Then i would like to put dual pipes straight out the back. Has anyone takin off the cats on these? Any suggestions?
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