AutoMeter 52mm Phantom Wideband Air/Fuel Ratio Gauge, Analog, 8:1-18:1 AFR (5770) S&B CNC machined from 6061 aluminum

CNC machined from 6061 aluminum with an O-ring side for a leak free seal

5" 6" 2811 3

So for instance

Part Number: Size: PFF44-201-24 24mm PFF44-201-26 26mm PFF44-201-29 29mm

AutoMeter 52mm Phantom Wideband Air/Fuel Ratio Gauge, Analog, 8:1-18:1 AFR (5770) S&B CNC machined from 6061 aluminumAnalog wideband air fuel ratio gauge with digital stepper motor technology, 8: 1 18: 1 AFR range, incandescent lighting, and self calibrating Bosch LSU4. 2 sensor. Designed for gasoline powered engines with 12 and 16 volt compatibility. Features: Traditional incandescent lighting illuminates around the perimeter of the dial Custom tuned 0. 1 AFR Resolution Bosch LSU4. 2 Sensor included 8ft wiring harness with 304 stainless steel weld in bung included