quick view Add to Cart Spectre Spectre Universal Tube 4in. OD x 18in. Length w/MAFS Mount - Aluminum - 9718 MSRP: $100.99 Spectre's 4 inch outside diameter - 18 inch long mass air sensor tube is designed for custom air intake systems utilizing 4 inch tubing and require the use of a blade-style mass air flow sensor. The welded on MAFS pad is designed for the GM and Ford... Add to Cart Add to Wish List Add to My Wish List Create New Wish List Compare