Valves in active exhaust rattling?

Discussion in 'Issues, Repairs, Warranty, TSB, Recalls' started by crcpdx, Aug 14, 2019.

  1. crcpdx

    crcpdx Member

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    Hi guys, Just put a mac cat delete on my 18 with active exhaust. In normal mode I can hear the drivers side valve slapping around. Makes the exhaust note horrible. Doesn't do it as bad in sport and not at all in track. So 2 questions; 1) Anyone else experience this after going catless? 2) are the valves adjustable, meaning can I tighten them? thanks
     
  2. 88lx50

    88lx50 Well-Known Member

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    There was a thread about this. I think the added pressure from removing the cats causes the rattle. I don't think anyone found a solution in the previous thread about it.
     
  3. Angry50

    Angry50 Well-Known Member

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    yes i had this on my 18, after i supercharged it the valve actually broke. can either leave cats in, get aftermarket active $$ or remove the active.
     
  4. Nonsequitur

    Nonsequitur Well-Known Member

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    Mine rattles at idle after I installed the H-pipe. Don't know if there is a way to tighten the valves to prevent the rattle.
     
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