---
product_id: 39634080
title: "Gunson G4055B Adaptor Kit 12 mm"
brand: "laser"
price: "£37.63"
currency: GBP
in_stock: true
reviews_count: 6
url: https://www.desertcart.co.uk/products/39634080-gunson-g4055b-adaptor-kit-12-mm
store_origin: GB
region: Great Britain
---

# 14mm to 12mm thread adaptor Perfect for classic motorcycles & 2-stroke engines Includes gas seal washer & hex key Gunson G4055B Adaptor Kit 12 mm

**Brand:** laser
**Price:** £37.63
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your compression testing game with precision and ease!

## Quick Answers

- **What is this?** Gunson G4055B Adaptor Kit 12 mm by laser
- **How much does it cost?** £37.63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/39634080-gunson-g4055b-adaptor-kit-12-mm)

## Best For

- laser enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Weighs just 1.41 ounces with sleek dimensions for easy portability and storage.
- • **Trusted Brand Quality:** Manufactured by The Tool Connection Ltd. under the reliable Laser brand.
- • **Classic & Modern Ready:** Engineered to fit both vintage motorcycles and contemporary two-stroke engines.
- • **Complete Installation Kit:** Includes gas seal washer and hex key for hassle-free setup right out of the box.
- • **Precision Thread Conversion:** Seamlessly adapts 14mm threads down to 12mm for versatile compatibility.

## Overview

The Gunson G4055B Adaptor Kit converts 14mm threads to 12mm, enabling compatibility with Hi-Gauge Compression Testers and Colortune tools. Designed for classic motorcycles and two-stroke engines, this lightweight kit includes a gas seal washer and hex key for quick installation. Manufactured by The Tool Connection Ltd., it ensures reliable performance for both vintage and modern engine diagnostics.

## Description

Product Description               G4055B - Gunson Hi Gauge and Colortune Plug Adaptor Kit 12 mm Thread G4055B. A kit to convert the thread on the popular Gunson Colortune and Hi Gauge Compression Tester. Fits most sizes of modern spark plugs for modern and classic cars as well as motorcycles, garden machinery and boats. Contents 1 x thread adaptor 12 mm, 1 x gas seal washer, 1 x hex key. Additional Information compression tester adaptor, for use on colortune and Hi Gauge. Suitable for most modern and classic cars. Available in additional sizes 10 mm, 12 mm, 14 mm and 18 mm.                  Set Contains:               Hi-Gauge Adaptor Kit 12mm

## Features

- Adaptor for Hi-Gauge Compression Tester, Part No. G4101 and Colortune, Part No. G4074.
- Thread size: 14mm to 12mm.
- Suitable for classic motorcycles and two stroke engines.
- Kit contains: 14mm to 12mm thread adaptor, gas seal washer and hex key.
- Other adaptors available, Part Nos. G4055A (10mm), G4055C (14mm tapered seat), G4055D (14mm long reach) and G4055E (18mm).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | The Tool Connection Ltd. |
| Brand | Laser |
| Model | G4055B |
| Item Weight | 1.41 ounces |
| Product Dimensions | 0.98 x 5.51 x 8.27 inches |
| Item model number | G4055B |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | G4055B |

## Product Details

- **Brand:** Laser
- **Thread Size:** 12 mm
- **Vehicle Service Type:** Car, Motorcycle
- **Global Trade Identification Number:** 05052436028689

## Images

![Gunson G4055B Adaptor Kit 12 mm - Image 1](https://m.media-amazon.com/images/I/71Lw+xhxcWL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by J***Z on November 30, 2022*

Perfect fit

### ⭐⭐⭐⭐⭐ Works as described.  Used with 14mm kit.  No problems.
*by T***I on September 12, 2017*

Works as described. Used with 14mm kit. No problems.

### ⭐⭐⭐⭐⭐ Great Tuneup Tool
*by E***L on November 29, 2013*

It is quick and easy to use. It is not complicated to read. Used it on mower, Jeep, chipper, and more.

## Frequently Bought Together

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

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*Product available on Desertcart Great Britain*
*Store origin: GB*
*Last updated: 2026-04-23*