AutoMeter · New
Autometer Carbon Fiber 52mm AFR or LAMBDA Digital Wideband Air/Fuel Ratio PRO Wideband A/F Kit
MPN 4778 · Store SKU atm4778
Supplier stock checked 11/7/2026, 9:31:37 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Knowing the exact air/fuel mixture running through your engine is the most important factor to extracting the highest levels of performance and durability. Not all wideband gauges are created equal. AutoMeter utilizes an advanced calibration method that automatically calibrates your gauge on every startup to assure you of the highest degree of accuracy over the entire lifespan of your sensor (no free air calibration is ever necessary). Compatible with nearly all fuel types, the AutoMeter Pro Wideband has a configurable display to pinpoint the exact range you want to keep an eye on. An advanced peak recall function and lean warning system make sure you’re safely making power, whether on the track or on the street. An automatically dimming display tailors light output for any condition. Data logging output is included for one wire or two wire systems in both lambda or AFR. Our specially designed O2 sensor and wiring harness are included for ease of installation. Quite simply, there isn’t a more accurate or easy to live with wideband gauge available on the market. GAUGE, AIR/FUEL RATIO-PRO, 2 1/16", 10:1-20:1, DIGITAL W/ PK & WRN, CARBON FIBER 2-1/16" WIDEBAND PRO AIR/FUEL RATIO, 6:1-20:1 AFR, PEAK & WARN, CARBON FIBER
Manufacturer fitment & guides
Check 4778 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
