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Old 28-08-2016, 08:25 PM
  #8  
Nosmonkey
Wahay!! I've lost my Virginity!!
 
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Join Date: Apr 2012
Location: Palmers Greek, London
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I had the same problem with my S2, albeit on MFI. lots of popping on the overrun, turns out the manifold bolts were loose and letting air in.