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...

Buy Now From Amazon

Product Review

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

Similar Products

Spectre Performance 9771 Black 4" Intake CouplerSpectre Performance 9781 Black 4" 90 Degree BootSpectre Performance 97990 4" 90° Aluminum Elbow with 7" LegSpectre Performance 9704 4" Hose Clamps - PairSpectre Performance 9775 4" Flex BootSpectre Performance 9719 6" Straight Aluminum Intake TubeICT Billet LS Heater Core Bypass Hose Coolant Crossover LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 LS2 LH6 L92 L76 LY2 LY5 LY6 LC9 LFA LH8 LMG LS3 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 551699Spectre Performance (97701) 22 Degree Intake CouplerSpectre Performance 990003 3-5/8" x 4" MAFS Adapter Sleeve for GMACDelco 213-4514 Professional Engine Coolant Temperature Sensor