1999 E46 328 - need advise on new headers???

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  1. 1999 E46 328 - need advise on new headers??? 
    #1
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    grommet's Car Details
    Model of Car:
    E46 328i
    Year of Manufacture:
    1999
    Transmission Type:
    manual
    Car Body Type:
    Touring

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    Hi can some one please help, as the thread states i have a 1999 E46 328, im looking at buying a new set of header for my car but am a little confussed, i noticed on a few different make that even tho the primary tube are all the same the outlet differ between either 2" or 2.25" i know it does not sound alot but im sure it would make a big difference, but which would be best suited to my car 2" or 2.25" i know my engine is pretty standard but am hoping to get her upto 240bhp later in the year or even go a little higher....
     
     

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    #2
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    Ronnie's Car Details
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    Generally it is how well a exhaust flows, generally a exhaust that has a higher flow(CFM) will give you more power, but too big a exhaust diameter means the gases lose velocity, meaning the gases do not exit the exhaust as quick.

    Have a read of this. Exhaust Flow in an Automobile
     
     

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    #3
    BMW Crazed
    Car Details
    grommet's Car Details
    Model of Car:
    E46 328i
    Year of Manufacture:
    1999
    Transmission Type:
    manual
    Car Body Type:
    Touring

    Join Date
    Aug 2010
    Location
    bournemouth
    Posts
    152
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    Thanked 5 Times in 5 Posts
    i will have a look at the website thanks ronnie, but just wanted to know what size headers other people use on there 2.8`s?
     
     

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