How would this interface with a microsquirt stand alone ecu and on a car pre-obd ii?

Don't get this one. Get the 30-0300, it comes with the complete harness. The 30-0333 is for new cars that can read the sensor off the canbus. Get the 30-0300.

Why does it show pictures of the 30-0311 but states this product is the 30-0344 for “piggy back” capabilities with hp tuners?

Not entirely sure what you mean. My kit came as pictured and works as advertised.

Will this wideband gauge work in “standalone mode”? i have a carbureted vehicle i need to tune and have no use for the obdii connectivity.

Yes. The gauge will display AFR on its own without connecting any of the obdii wiring

Does the digital gauge still work if the obd port is not connected? I would use this wideband for multiple car use not a single install.

Yes. The OBD pass through connector is just to get the information into your data logging software. The sensor reads into the gauge and then sends signal through a separate plug to the OBD port.

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⚡ Tune smarter, not harder — dominate your drive with precision AFR control!

ULTRA COMPACT DESIGN - Sleek 52mm gauge with just 0.825” depth fits seamlessly into any dash setup.
CUSTOMIZABLE DISPLAY MODES - Switch between AFR, Lambda, and O2% with 3- or 4-digit precision to suit your tuning style.
ADVANCED DATA LOGGING READY - Optional 0-5V & RS232 outputs enable professional-grade feedback control and logging.
LIGHTNING FAST AFR READINGS - Experience the quickest wideband sensor response for real-time tuning precision.
PLUG PLAY OBDII CONNECTIVITY - Effortlessly stream AFR data through your factory ECU’s CAN-bus—perfect for piggyback or open-source tuning.

The AEM X-Series Wideband UEGO AFR Sensor Controller Gauge delivers the fastest wideband air-fuel ratio readings with seamless OBDII CAN-bus integration. Featuring a compact 52mm gauge, customizable display, and optional data logging outputs, it’s engineered for professional tuners and enthusiasts seeking real-time, precise AFR feedback through factory ECU systems.

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Brand	AEM
Material	Plastic Metal
Item dimensions L x W x H	6 x 5 x 5 inches
Item Weight	0.5 Kilograms
UPC	840879025199 608067031410 672713960775
Global Trade Identification Number	00672713960775
Manufacturer	AEM Electronic Inc.
Model	Universal
Item Weight	1.1 pounds
Product Dimensions	6 x 5 x 5 inches
Item model number	30-0333
Is Discontinued By Manufacturer	No
Manufacturer Part Number	30-0333
OEM Part Number	30-0334

AEMX-Series Wideband UEGO AFR Sensor Controller Gauge with OBDII Connectivity

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