Classic Mini Colortune Fuel Mixture Gauge

The special see-through spark plug actually lets you see inside the combustion chamber to see what

Colortune plug insert changes the air-fuel mixture combustion color while the engine is running. Ref: MSA1002, COLORTUNE, GUNG4074, GUNSON02.

Colortune, Carb Tune-Up Tool (STL0037)

GlowShift’s Tinted 7 Color Series Narrowband Air/Fuel Ratio Gauge monitors your engine's air to fuel mixture by reading the voltage output of a

Tinted 7 Color Narrowband Air/Fuel Ratio Gauge

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Adjusting fuel mixture using Gunson Colortune –

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Gunsons colortune 14mm spark plug 'G4074' – Minisport

Colortune engine tuning mixture setting on a Classic Mini ERA

Classic Instruments Store / Traditional 2 1/8 Air Fuel Ratio Gauge