This kit converts the thread on Colortune and Hi Gauge Compression Tester to fit 18 mm spark plugs holes
- G4055e - Gun-son hi gauge and plug adaptor kit 14 mm to 18 mm thread G4055E
- A kit to convert the thread on the popular gun son 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
- G4055e - Gun-son hi gauge and plug adaptor kit 14 mm to 18 mm thread G4055E
- A kit to convert the thread on the popular gun son 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
