---
product_id: 49665237
title: "Gunson G4074 Colortune Single Plug Kit 14mm"
brand: "gunson"
price: "6361 som"
currency: KGS
in_stock: false
reviews_count: 8
url: https://www.desertcart.kg/products/49665237-gunson-g4074-colortune-single-plug-kit-14mm
store_origin: KG
region: Kyrgyzstan
---

# Visual combustion insight 14mm precision gap UK-made quality Gunson G4074 Colortune Single Plug Kit 14mm

**Brand:** gunson
**Price:** 6361 som
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Tune smarter, not harder with the original combustion color tool! ⚙️

## Quick Answers

- **What is this?** Gunson G4074 Colortune Single Plug Kit 14mm by gunson
- **How much does it cost?** 6361 som with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/49665237-gunson-g4074-colortune-single-plug-kit-14mm)

## Best For

- gunson enthusiasts

## Why This Product

- Trusted gunson brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Compatibility:** Works with petrol/LPG 2 & 4 stroke engines, single or multiple carburettors, and fuel injection systems.
- • **Precision 14mm Spark Plug Fit:** Engineered to fit most petrol engines with a perfect 14mm thread size for seamless installation.
- • **Trusted British Craftsmanship:** Proudly manufactured in the UK, combining decades of automotive expertise with ethical sourcing.
- • **Simplify Carb Tuning Like a Pro:** Demystify carburettor tuning and boost engine performance without the guesswork or stress.
- • **Real-Time Combustion Visualization:** See the combustion chamber in action to fine-tune your fuel/air mixture with unmatched clarity.

## Overview

The Gunson G4074 Colortune Single Plug Kit is a precision 14mm spark plug tool designed for petrol and LPG engines, enabling users to visually monitor combustion and optimize fuel/air mixtures. Manufactured in the UK with alloy steel and copper components, it supports 2 and 4 stroke engines with various carburettor setups. Ideal for both novice and classic car enthusiasts, it simplifies carb tuning by providing real-time combustion feedback, enhancing engine performance and confidence.

## Description

The Tune-up plug for Petrol/LPG 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. It allows you to see the combustion and to adjust the mixture by colour. Fits most petrol engines in standard form with additional adaptors available for vehicles with alternative sized spark plugs. A British tool company based in Warwickshire, United Kingdom. Gunson Tools draws on years of experience to introduce quality products which offer real value for money. All our products are responsibly sourced both from trusted ethical partners across the world PLUS (uniquely as an automotive tool brand) our own manufacturing base in the UK. Trusted quality products like Eezi-Bleed, ColourTune, Carbalancer and Eezi-lap are just a few names within the range. Combining our British manufacturing, our years of experience and vast expertise in the automotive sector helps us achieve our aim of bringing high quality tool solutions first to market and being No.1 choice for the Classic vehicle technician

Review: Simple to use and accurate enough to get you going. Takes some of the Voodoo out of carb tuning :) - I bought this because as a novice, after doing online research, I was feeling somewhat intimidated about tuning the carbs on my MGB roadster and I thought that this would provide me with an "easy" solution. And it did :) It seems that it is a bit of a "Marmite" product that you either hate or love. More experienced vintage car enthusiasts claim that it is inaccurate and unnecessary while other, probably less experienced owners, love it for its simplicity. I am a believer. It is incredibly easy to use and allowed me to tune my carbs to a significantly better state quickly and without stress. As a side benefit, it also provides you with the pretty cool opportunity to actually see the bang going on inside your engine! :) Remember that if you have a multi-carb engine, you will need to use this on one cylinder being fed by EACH of the carbs One caveat. The colortune is only an indication of fuel/air mixture combustion and therefore, in my opinion, does not replace a full carb tuning an balancing process. It does however give you the opportunity to easily get a close approximation to improve your ignition burn and running. In my case it also removed the vooodoo factor and made me more confident to then learn to fully tune the carbs on my car.
Review: Does what it says on box - As above it works well and does it's job. I had one back in the 80s and this is just not the same quality the plastic parts are so much thinner and cheap to look at and feel I don't expect it to last as long as my old one before I lost it. Shame as it does deserve a 5 star rating but I suppose Colour tune will more than likely say they are cutting down on the plastic to be environmental.

## Features

- Automotive Tool

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0012MB4VE |
| Best Sellers Rank | 352,164 in Automotive ( See Top 100 in Automotive ) 1,369 in Car Spark Plugs |
| Brand Name | GUNSON |
| Compatible with Vehicle Type | Car |
| Core Material | Alloy Steel |
| Customer Reviews | 4.4 out of 5 stars 580 Reviews |
| Gap Size | 14 Millimeters |
| Global Trade Identification Number | 05018341740740 |
| Included Components | 1 x Gunson Colortune 14 mm Kit Colortune Spark Plug Carburettor Mixture Tool |
| Item Type Name | Gunson Colortune 14 mm Kit Colortune Spark Plug Carburettor Mixture Tool |
| Item Weight | 0.15 Kilograms |
| Item height | 16.5 centimetres |
| Manufacturer | Tool Connection (EU) |
| Manufacturer Part Number | G4074 |
| Manufacturer Warranty Description | 12 Month |
| Thread Size | 14 millimeters |
| Top Material Type | Copper |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** GUNSON
- **Core material:** Alloy Steel
- **Thread size:** 10mm
- **Top material type:** Copper
- **Vehicle service type:** Car

## Images

![Gunson G4074 Colortune Single Plug Kit 14mm - Image 1](https://m.media-amazon.com/images/I/710aUHECQJL.jpg)
![Gunson G4074 Colortune Single Plug Kit 14mm - Image 2](https://m.media-amazon.com/images/I/71INdVX7UEL.jpg)
![Gunson G4074 Colortune Single Plug Kit 14mm - Image 3](https://m.media-amazon.com/images/I/71LoOD2DumL.jpg)
![Gunson G4074 Colortune Single Plug Kit 14mm - Image 4](https://m.media-amazon.com/images/I/71rioNhUcxL.jpg)
![Gunson G4074 Colortune Single Plug Kit 14mm - Image 5](https://m.media-amazon.com/images/I/71uIZ6uZRUL.jpg)

## Questions & Answers

**Q: does this kit fit a 1967 mg midget**
A: The Amazon description says that it is a 14mm kit so, in my opinion, it should be fine for fitting into your '67 Midget. The best way to be 100% sure is to check the size of the plugs used in YOUR Midget engine block and order accordingly. Hope this helps.

**Q: Does this fit Land Rover Series 3 2.25 engines**
A: It has 2 adaptors in the kit    def fits 14mm plugs

**Q: Will this fit a 1966 lotus elan twin cam cylinder headr**
A: If you have 14mm spark plugs then yes it will

**Q: my vw late bay has ngk D8EA (12mm) long reach spark plugs will this colour tune version be suitable?**
A: No, you will need an adaptor for a 12mm long reach plug. I suggest you telephone the distributor on 0126815888 to make sure you get the correct kit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple to use and accurate enough to get you going. Takes some of the Voodoo out of carb tuning :)
*by S***I on 1 October 2015*

I bought this because as a novice, after doing online research, I was feeling somewhat intimidated about tuning the carbs on my MGB roadster and I thought that this would provide me with an "easy" solution. And it did :) It seems that it is a bit of a "Marmite" product that you either hate or love. More experienced vintage car enthusiasts claim that it is inaccurate and unnecessary while other, probably less experienced owners, love it for its simplicity. I am a believer. It is incredibly easy to use and allowed me to tune my carbs to a significantly better state quickly and without stress. As a side benefit, it also provides you with the pretty cool opportunity to actually see the bang going on inside your engine! :) Remember that if you have a multi-carb engine, you will need to use this on one cylinder being fed by EACH of the carbs One caveat. The colortune is only an indication of fuel/air mixture combustion and therefore, in my opinion, does not replace a full carb tuning an balancing process. It does however give you the opportunity to easily get a close approximation to improve your ignition burn and running. In my case it also removed the vooodoo factor and made me more confident to then learn to fully tune the carbs on my car.

### ⭐⭐⭐⭐ Does what it says on box
*by G***H on 12 February 2020*

As above it works well and does it's job. I had one back in the 80s and this is just not the same quality the plastic parts are so much thinner and cheap to look at and feel I don't expect it to last as long as my old one before I lost it. Shame as it does deserve a 5 star rating but I suppose Colour tune will more than likely say they are cutting down on the plastic to be environmental.

### ⭐⭐⭐⭐⭐ have had one of these yaers ago but have mislaid ...
*by V***N on 13 June 2016*

have had one of these yaers ago but have mislaid it - it will not work on an engine without it being at tickover - so would not do what I needed ( set up a small generator which runs at 3000rpm). Have used this type of product on many petrol engined cars in the past and it has paid for itself many times over.

## Frequently Bought Together

- GUNSON G4074 Colortune Single Plug Kit 14mm
- Gunson G4055B Adaptor Kit 12 mm

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-02-02*