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Q: what size adaptor do i need for spark plug autolite AP63 ?

It would be a good idea if you supplied the thread size on the spark plug you need info on, if you did that I could answer your question.

Q: Using a digital caliper, i measured the threaded portion of the spark plug and got a reading of 13.80mm. do i use the 14mm size colortune kit?

I would have to say yes you are correct, but I better add that just in case it is not you should check the thread pitch with guages or your caliper. Coarse thread is 2mm pitch and fine is 1.5mm fine. If you need any more info I'll check mine

Q: Will this tool work on a 72 Porsche engine. Or do I need adapters

I used it for 25 years on a '71 VW Super Beetle with the standard 1600 engine. It works like a charm. Mine was bought in the 80s from an adv. in Hot VWs. I still have the shipping bag with the nice black box. 'Never let me down.

Q: Will this work for a 70 gmc jimmy strait 6 2barrel carb , thanks.

I use this on my Mopar V8 440 from a '68 Chrysler 300. The 14mm thread. i recommend loosening up the plugs when the engine is cold and then (anti-seize) them back in not too tight. You could do all 8, but, for me, I am fine with just two on each side of my split plenum intake. ( If you have a split plenum design, check your runners on your intake so that you are really reading two from each carb side. Pretty funny if you happen to pick all four from the same carb circuit! For example, on RB engines, 3 and 5, 1 and 7, or 4 and 6, 1 and 8 are matched sides for a 4-barrel. So, 1 and 3, or, 2 and 4 would work fine.) Keep in mind the hot exhaust manifold/headers, so, pick the plugs you can get in without burning your fingers and heating up your plastic pipe (Gunson). After your engine is warmed up and you have done your vacuum or rev range or even AFR idle, etc., switch out the plug for the Gunson. If you can, wrap the plastic in the 1" DEI or similar heatshield. I used the Firesleeve. This will protect the flimsy black plastic. And, when done - don't take too long running the engine - take off the plastic parts and plug. Don't let heat soak kill your piece.

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Description

🔧 Tune in precision, drive with confidence!

COMPACT LIGHTWEIGHT - Weighing just 5.3 ounces and measuring 6.5 inches, it’s perfect for on-the-go professionals.
EXPANDABLE ADAPTORS RANGE - Additional adaptor sizes available separately to cover all your automotive needs.
CLEAR INSTRUCTIONS INCLUDED - Comes with detailed instructions so you can get the job done right the first time.
VERSATILE HEXAGONAL ADAPTOR - Includes a durable hexagonal adaptor for easy installation and enhanced torque control.
PRECISION FIT FOR MOST VEHICLES - Fits M14 threaded plugs ensuring seamless compatibility with a wide range of cars.

The G4074 Colortune Single Plug Kit 14mm by Gunson is a compact, lightweight automotive tool designed for precise tuning of vehicles with M14 threaded plugs. Featuring a copper core and a hexagonal adaptor, it ensures durability and ease of use. Expandable with additional adaptors, this kit is ideal for professional mechanics and car enthusiasts seeking reliable, versatile tuning solutions.

Specifications

Brand	GUNSON
Core Material	Copper
Thread Size	12 millimeters
Top Material Type	Copper
Vehicle Service Type	Car
Global Trade Identification Number	05018341740740
Manufacturer	Tool Connection (EU)
Model	G4074
Item Weight	5.3 ounces
Product Dimensions	1.18 x 4.53 x 6.5 inches
Item model number	G4074
Is Discontinued By Manufacturer	No
Manufacturer Part Number	G4074

Have a Question? See What Others Asked

what size adaptor do i need for spark plug autolite AP63 ?

Using a digital caliper, i measured the threaded portion of the spark plug and got a reading of 13.80mm. do i use the 14mm size colortune kit?

Will this tool work on a 72 Porsche engine. Or do I need adapters

Will this work for a 70 gmc jimmy strait 6 2barrel carb , thanks.

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