AutoMeter  |  SKU: ST3403

Autometer Stack Instruments 52mm Wideband Air-Fuel Ratio (LAMBDA) Gauge - Black

Regular price USD 50453

Can I pick up my order or have it installed at your shop?

Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.

How do I know if this part fits my vehicle?

Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.

What if I need to return a product or it’s defective?

Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)

What's the lead time on custom or fabricated parts?

Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.

Tune with confidence using the Stack Instruments 52mm Wideband Air-Fuel Ratio (Lambda) Gauge, Black – dimmable dual digital red numeric and multi-colour radial LED displays give an accurate real-time readout of air/fuel ratio or lambda.

Why Choose the Stack 52mm Wideband AFR Gauge?

  • AFR or lambda – user-selectable readout in a format optimised for driver viewing.
  • Adjustable scaling – tailor calibration for specialty fuel types and maximum display resolution.
  • Peak lean recall + alarm – quick data review and programmable driver alerts.
  • Logger and ECU ready – 0-5Volt analogue and serial data outputs for real-time closed-loop feedback.
  • Auto dimming – an inboard photo sensor adjusts intensity to ambient light.
Kit Includes
  • 52mm wideband gauge
  • Wiring harness
  • Bosch LSU4.9 sensor
Notes
  • Manual dimming may be enabled via a switch connected to the illumination wire on the loom.

SKU: ST3403

⚠ WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Questions? We’re Here to Help.

Have questions about upgrades for your tune? Contact FASS Motorsports and we’ll get you dialed:

Phone: 636-429-7020

Email: info@fassmotorsports.com