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S210 e230 exhaust size

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Smaltze, Aug 23, 2015.

  1. Smaltze

    Smaltze Senior Member

    Likes Received:
    Aug 13, 2015
    Your Mercedes:
    E320 S210 2002
    I know its my first post, but im not a total newbie! work with me here.

    Planning to put a straight pipe on my S210 e320 2002, attached to the single pipe cutting it just before the backbox, anyway measuring that pipe (which goes from the 2nd cats all the way to the backbox) its outside diameter seems to be 2.7 inches, give or take half a mil. Is this correct?

    If it is, it's going to be very frustrating to perhaps buy a 2.5 inch pipe and work out how to connect the two since i don't want to weld (incase i don't like!). Or is it easire to connect them than im thinking?

    So can anyone shed light?

    Otherthings to mention -

    Should i be putting the straight pipe here and not 2 pipes all the way from the 2nd cats.

    Should i get an exhaust trim, instead of a bare pipe.

    Thanks! :)
  2. hotrodder

    hotrodder Senior Member

    Likes Received:
    Oct 18, 2008
    Your Mercedes:
    '93 320te, '54 ragtop beetle (in bits)
    It'll sound ****** horrible and drive you insane on long journeys/motorways. Replacing the middle box with a 2 into 1 section that hooks upto the origional back box (or a [strike]sport silencer[/strike] fart cannon if you really want a headache) won't ruin a quiet/refined car as much or draw as much negative attention

    Dunno what dia the exhaust is off the top of my head but if it's about 2.7" (68.58mm) then why 2.5" (63.5mm) for replacement straight through pipework? ERW (electric resistance welded) mild steel tube exists in 66.68mm and 69.85mm OD and several different wall thicknesses although the 66.68 won't be as commonly available or in as wide a range of wall thicknesses. Same deal with stainless tube

    The back box (replacements at least) are a 'slip fit' which is done by expanding one of the tubes so it slips over the other and is secured with a clamp (not shown in the pic). Note that while you'll find exhaust expander tools for sale cheaply on the bay etc they won't work regardless of what the adverts say... 'real' ones are hydraulic and don't cost £14.99 for a set of 3

    and a clearer pic of a slip fit joint on straight bit of tube

    Any exhaust specialist should be able to expand some tube to make you a slip joint. Most will probably be cheaper than buying some tube from Jetex or the bay too
    Last edited: Aug 24, 2015

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