Spectre Performance 9774 Mass Air Flow Sensor Sleeve Kit for GM;
Spectre Performance 9774 Mass Air Flow Sensor Sleeve Kit for GM

Spectre’s intake couplers and reducers for GM mass airflow sensors are designed to adapt most boot-in style GM mass air flow sensors to a 4 inch intake system. We offer 3-5/8 inch to 4 inch reducers as well as 3-7/8 i...

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Spectre’s intake couplers and reducers for GM mass airflow sensors are designed to adapt most boot-in style GM mass air flow sensors to a 4 inch intake system. We offer 3-5/8 inch to 4 inch reducers as well as 3-7/8 inch to 4 inch reducers.

  • GM in-boot mass air sensor adapter
  • Multiple sizes available
  • Adapt GM in-boot mafs to 4 inch tubing
  • Couplers and reducers
  • GM in-boot mass air sensor adapter
  • Multiple sizes available
  • Adapt GM in-boot mafs to 4 inch tubing
  • Couplers and reducers

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