The lambda meter (fuel/air ratio meter) and the small revcounter that I will install under the dash. – Tommi's Saab Site
Mini 4 - Verbrennungsverhaeltnisanzeige - Lambda Meter | Koso Europe English
52mm Air Fuel Ratio Gauge With 4-wrie Universal Lambda Probe Oxygen O2 Sensor Car Gauge Digital Display Fit For 12v Car 234-4209 - Glow Gauges - AliExpress
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ETAS LA3 LAMBDA METER | eBay
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Mini 4 - A/F Ratio Lambda meter KOSO - OnlyMX - For Cross & Supermoto Heroes