Gunson G4074 colortune single plug kit for vehicles with 14mm spark plug

Gunson Colortune
Availablity: 30 in stock


£34.50 (inc. VAT)

30 in stock

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Gunson Colortune single plug kit for spark plugs with 14mm thread


The Tune-up plug for Petrol and LPG fuelled 2 and 4 stroke engines with single, twin or multiple carburettors or fuel injection systems.

The original and best tool for seeing what’s happening inside the combustion chamber of the petrol engine.

This tool allows you to see the combustion colour and from that adjust the fuel mixture to achieve the correct stoichiometric ratio indicated by colour.

Fits most petrol engines in standard form with additional adaptors available (listed below) for vehicles with alternative sized spark plugs


This kit includes

  • 14mm short reach plug
  • Hexagonal adaptor


Other adaptors available

G4055A converts from 14mm to 10mm

G4055B converts from 14mm to 12mm

G4055C converts from 14mm to 14mm tapered fit

G4055D converts from 14mm to 10mm long reach

G4055E converts from 14mm to 18mm

Weight 0.250 kg

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