Autometer Z-Series 2-1/16in. 10:1-17:1 AFR Digital Street Air/Fuel Ratio Gauge

Key Features & Benefits

Digital AFR Readout (10:1 – 17:1 Range)
Clear, accurate air/fuel ratio readings so you know exactly what your engine is doing—not guessing.

2-1/16″ Standard Size (52mm)
Fits most gauge pods, A-pillars, and dash setups. No custom fabrication circus required.

Z-Series Styling
Classic black face with white lettering and a subtle green glow. Clean, OEM+ look without screaming “race car.”

Wideband O2 Sensor Compatibility
Designed to work with wideband systems (required for accurate AFR readings).

Real-Time Monitoring
Instant feedback under load, idle, and boost—because problems don’t wait.

Autometer Z-Series 2-1/16in. 10:1-17:1 AFR Digital Street Air/Fuel Ratio Gauge

Why You Actually Need This

Air/fuel ratio is everything. Too rich? You’re wasting fuel and power. Too lean? Congrats, you’re speed-running engine damage.

This gauge keeps you in the safe zone, whether you’re boosted, NA, or just trying to keep your daily from detonating itself.

Leading edge three-layer construction engineered to offer protection to the internal of your car with taste, protection, and luxury for your day-to-day ride

What It’s Actually Good For

• Monitoring AFR on turbo builds
• Preventing lean conditions (aka engine killer mode)
• Dialing in tunes for performance and efficiency
• Diagnosing fuel delivery issues
• Making sure your mods aren’t secretly ruining everything

Ideal AFR Ranges (Quick Reality Check)

• Idle / Cruise: ~14.7:1 (stoichiometric)
• Boost / WOT: ~11.5–12.5:1 (safe power zone)
• Too Lean (>13 under boost): 🚨 danger zone
• Too Rich (<10): sluggish + fuel waste

Installation Notes (Don’t Skip This)

• Requires a wideband O2 sensor & controller (not optional)
• Install sensor in exhaust (usually downpipe)
• Wire to ignition + ground + signal
• Calibrate properly or enjoy inaccurate readings

Is AutoMeter Z-Series AFR Gauge Worth It?

If you’ve modified your engine at all—yes, 100%.

This isn’t a “nice to have,” it’s a don’t-blow-your-engine-up tool. Clean design, reliable readings, and essential for anyone running boost or tuning performance setups.

If you’re serious about your build, this should’ve been installed yesterday.