The fastest responding controller on the market. Supplied without a gauge for a stealthy and more permanent installation.
Still want to be able to see your AFR in real time? Why not use a CanChecked Gauge? https://bofiracing.co.uk/product/can-checked-multi-function-cluster-gauge-for-mazda-mx-5-na-nb/
X-Series Inline Wideband UEGO AFR Sensor Controller with X-Digital Technology. Includes: X-Series Inline Wideband Controller, Bosch LSU 4.9 Sensor & O2 Sensor Bung