--- product_id: 49665237 title: "Gunson G4074 Colortune Single Plug Kit 14mm" brand: "gunson" price: "€ 0.14" currency: EUR in_stock: false url: https://www.desertcart.be/products/49665237-gunson-g4074-colortune-single-plug-kit-14mm store_origin: BE region: Belgium --- # Visual combustion insight Fits most petrol engines UK-made quality Gunson G4074 Colortune Single Plug Kit 14mm **Brand:** gunson **Price:** € 0.14 **Availability:** ❌ Out of Stock ## Summary > ⚡ Tune smarter, not harder — see the spark that drives your engine! ## Quick Answers - **What is this?** Gunson G4074 Colortune Single Plug Kit 14mm by gunson - **How much does it cost?** € 0.14 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/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 - • **Lightweight & Portable:** Compact 150g design fits comfortably in any professional toolkit - • **Universal Compatibility:** Works with petrol/LPG 2 & 4 stroke engines, single or multi-carb setups - • **Simplify Carburettor Tuning:** Remove the ‘voodoo’ factor and gain confidence with easy-to-use diagnostics - • **See Your Engine’s Heartbeat:** Visualize combustion for precise tuning without guesswork - • **Trusted British Craftsmanship:** Manufactured in the UK with ethical sourcing and decades of expertise ## Overview The Gunson G4074 Colortune Single Plug Kit is a precision automotive tool designed to visually reveal combustion quality inside petrol and LPG engines. Compatible with 2 and 4 stroke engines and multiple carburettor types, it enables quick, confident tuning by showing the fuel-air mixture color inside the combustion chamber. Proudly manufactured in the UK, this lightweight, easy-to-use kit is ideal for both novice and classic vehicle enthusiasts seeking to optimize engine performance with trusted British engineering. ## 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 ## Features - Automotive Tool ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0012MB4VE | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | 410,628 in Automotive ( See Top 100 in Automotive ) 1,649 in Car Spark Plugs | | Brand Name | GUNSON | | Compatible with Vehicle Type | Car | | Core Material | Alloy Steel | | Customer Reviews | 4.4 4.4 out of 5 stars (580) | | 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 | | Manufacturer | Tool Connection (EU) | | Manufacturer Part Number | G4074 | | Manufacturer Warranty Description | 12 Month | | Model Number | G4074 | | Thread Size | 14 millimeters | | Top Material Type | Copper | | Unit Count | 1.0 count | ## Product Details - **Brand:** GUNSON - **Core material:** Alloy Steel - **Thread size:** 14 millimeters - **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/71uIZ6uZRUL.jpg) ![Gunson G4074 Colortune Single Plug Kit 14mm - Image 3](https://m.media-amazon.com/images/I/71INdVX7UEL.jpg) ![Gunson G4074 Colortune Single Plug Kit 14mm - Image 4](https://m.media-amazon.com/images/I/810wIQpqV8L.jpg) ![Gunson G4074 Colortune Single Plug Kit 14mm - Image 5](https://m.media-amazon.com/images/I/71LoOD2DumL.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. ## Frequently Bought Together - GUNSON G4074 Colortune Single Plug Kit 14mm - Gunson G4055B Adaptor Kit 12 mm --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/49665237-gunson-g4074-colortune-single-plug-kit-14mm](https://www.desertcart.be/products/49665237-gunson-g4074-colortune-single-plug-kit-14mm) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-25*