Modify plenum?????

Port match the opening to the throttle body, cut out the square egr tower inside and also the lower intake needs to have the square egr tower milled out of it also. Like Raf said this is done to improve air flow and help get more air to the two front cylinders. What is your current setup on your car, there is alot that can be done if it is stock.
there is a few pics my upper and lower


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    photo chars 006.jpg
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  • upper int 1.jpg
    upper int 1.jpg
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    upper int 2.jpg
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Weld a piece into the back of it to function just like a power plate. Without the powerplate restriction :)