This manometer built into a Golf 2 "button type" support will indicate the air fuel ratio with the aim of adjusting the settings and reaching an optimum ratio of 14.7:1 (14.7 volumes of air for 1 volume of fuel), essential for turbocharged engines (Turbo, Compressor). !
Indications are given through coloured graduations (red, yellow, green)
Fits perfectly into the passenger compartment!
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