Silenced Cat Bypass Pipe...!

Discussion in 'Engines' started by jcorallo, Nov 30, 2003.

  1. jcorallo Forum Member

    Joined:
    Oct 22, 2003
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    Location:
    United Kingdom
    Well - I swore I'd stop the spending...

    Car: 1993 Golf VR6.

    I've got the Scorpion SS Boxer cat back system installed. This deletes the first OEM silencer in place of a straight pipe. So the final system only has two silencers - a mid and back box.

    This was already quite a loud system - so when I added a straight through cat bypass pipe - it became almost intolerable.

    So off I went to Zaust Ltd in Clitheroe, Lancashire - where I got them to make me up a silenced cat bypass pipe in Stainless Steel.

    There were two main requirements:

    1) Quieter than a straight through pipe
    2) Easier to swap the cat and cat-bypass in and out for MOT's and RWYB days etc

    So here it is:

    [​IMG]

    5 bolts now and the cat is off and on goes this pipe. This was essential as messing about with siezed overlapping exhaust pipes was a nightmare. When I initially fitted my own cat bypass pipe, it took me about an hour to remove the pipe from the back end of the cat box - the clamps had crimped the pipe so it was well stuck on. Nightmare.

    The long centre pipe on the car now has the matching two bolt flange - and is adjustable for rotation.

    The cat now has a removable adaptor at the back to mate to this two bolt flange on the centre pipe which keeps the cat standard and unmodified.

    The rear two bolt flange is not a sealing face itself - the two pipes intersect/overlap about 5mm or so to form a seal so this will be a doddle to undo.

    The front flange with Lambda boss were supllied by me from my old cat bypass pipe.

    Jules
    Edited by: jcorallo
     

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