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    4-2-1 or 4-1 Header ??

    So the 4-1 OBX header would do fine for somewhat gains for the price of them? What I just read I kinda understand but not fully understand. All this stuff is new to me. All the replys has been great but I feel that I'm still in the dark.
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    4-2-1 or 4-1 Header ??

    I'm trying to decied which header is the best,4-2-1 or 4-1 for the 2002 Mazda Protege 5 automactic. Any info would be great. Thank You Brian
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    Turbos??

    I was wanting to know if you are able to put a turbo on an automatic 2002 Mazda Protege 5 2.0 L ?? Looking for some headers that give you some what gains in horsepower. Does anyone reccomend any specific brand. Thank You...
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