Spectre’s intake couplers and sleeves for GM mass air flow sensors are designed to adapt the majority of boot-in style GM mass air flow sensors to a 4 inch intake system. This kit includes a 3-5/8 inch to 4 inch sleeve as well as two 3-7/8 inch to 4 inch sleeves.
- Designed for GM boot-in mass air flow sensor adapters
- Includes one 3-5/8 inch to 4 inch sleeve and two 3-7/8 inch to 4 inch sleeves
- Adapts GM boot-in mass air flow sensors to 4 inch intake systems
- See P/N 990003 for applications requiring an additional 3-5/8 inch sleeve