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Congo Basin Group

30-0300 X-Series Wideband O2 Air Fuel Ratio Gauge Kit — LSU 4.9 0258017025 Oxygen Sensor with AFR Controller Gauge

30-0300 X-Series Wideband O2 Air Fuel Ratio Gauge Kit — LSU 4.9 0258017025 Oxygen Sensor with AFR Controller Gauge

Regular price $95.37 USD
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Take your engine tuning to the next level with the Dynoracing 30-0300 X-Series Wideband AFR Gauge Kit — a precision-crafted tool engineered for speed, accuracy, and reliability. Designed for high-performance enthusiasts, this kit includes the advanced LSU 4.9 wideband UEGO oxygen sensor (0258017025) and a user-configurable gauge controller to give you real-time, ultra-precise air/fuel ratio (AFR) data.

Whether you’re tuning a race car, dyno testing, or maintaining optimal performance for daily driving, this gauge kit delivers exceptional accuracy with industry-leading speed. No free-air calibration is required thanks to factory calibration, but the system allows free-air calibration as the sensor ages, ensuring longevity and reliability.


Key Features

  • High-Speed Response – Among the fastest wideband AFR controllers tested, providing instantaneous, precise AFR readings.

  • 4.9 LSU Wideband Sensor Included – Reliable oxygen sensor for accurate air/fuel ratio measurement.

  • User Configurable Display – Easily switch between AFR, Lambda, or O₂%, and choose three- or four-digit display modes.

  • Slim & Compact Design – 52mm diameter with a slim profile for versatile mounting.

  • Versatile Compatibility – Works on gasoline, methanol, ethanol, diesel, propane, and CNG systems for EFI and carbureted engines.

  • Advanced Outputs – 0-5V and RS232 outputs for data logging, plus CANbus for daisy-chaining up to 16 cylinder controllers.

  • Factory-Calibrated – Precision calibration with optional free-air calibration as sensor ages for consistent accuracy.


Why Choose the 30-0300 X-Series Gauge

Precision tuning is the difference between good performance and great performance. The Dynoracing X-Series AFR Gauge gives you real-time control over your engine’s AFR, helping you maximize efficiency, power, and safety. The innovative X-Digital technology ensures no loss of data fidelity, capturing even the smallest changes in exhaust composition.


Package Includes

  • 1 × 30-0300 X-Series Wideband AFR Gauge Controller

  • 1 × LSU 4.9 Wideband UEGO Oxygen Sensor (0258017025)

  • Mounting Hardware

  • Wiring Harness

  • Dual-Faced Black Faceplate & Black Bezel

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