However, catalytic converter failure is often the result of pre-existing engine problems (fuel trim issues, burning oil, or failed o2 sensors) PRIOR to replacing a cat, ensure all systems are functioning correctly or you may experience repeated failure.
AEM Original Digital Wideband Bosch 4.9 LSU UEGO Air / Fuel Ratio Gauge 30-4110
The Wideband O2 air/fuel ratio UEGO gauge is a must if you want to maximize your engine's power and safety. Instructions for the 30-4100 will still be available in the Instructions tab after this change.
AEM 30-4110 Digital Wideband UEGO AFR Gauge with Sensor(Pack of 2)
Instructions for the 30-4100 will still be available in the Instructions tab after this change. Accurate AFR data is critical when tuning an engine. 4.9 LSU wideband sensor and weld-in bung included (PN 30-4110).
Aem 30-4110 AEM Digital Gauges
Instructions for the 30-4100 will still be available in the Instructions tab after this change. AEM Digital Wideband UEGO Gauge.