Masata BMW N55 Lambda Spacer Fooler O2 Oxygen Sensor Boss

MasataSKU: MST0099
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Sale price£29.99

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The N55 spacer is designed to move the lambda sensor after the catalytic converter away from the flow of exhaust gases when a car has a sports cat or Decat to keep the engine light off.

It can also be used in some applications to move the lambda sensor away if it’s touching something and space is there to fit and use this.


  • Height when fitted: 45mm, Total height without fitting: 50mm, Length: 45mm, M18 x 1.5mm thread.
  • Manufactured from Stainless Steel
  • Made for the N55 engine which either has a sports cat or catless downpipe installed 


N55 engine


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