MSD standalone Air/Fuel Wideband 02 Gauge Kits are extremely accurate and compatible with both EFI and carbureted fuel systems. Available in black- and white-face versions, these feature-packed, analog-style standalone gauges measure 2 1/16-inch in a slim-style package that takes up very little dash space. Their easy-to-read analog dial includes a 270-degree sweep pointer from 6 o’clock to 3 o’clock. An internal microprocessor controls pointer movement to ensure accurate reading in street, off-road, and race conditions. Check out holley.com or call 866.464.6553 for more information.