Adapter to fit on the 14mm Colortune plug kit. There are12mm and 10mm adapters. They adapt the 14mm plug kit to fit onto either 12mm or 10mm plug motorcycles. Only for engines with at least 180cc per cylinder.
Also available 14mm "taper slim" adapter and 14mm "long" adapter.
18mm adapter for some Ford OHC engines, some vintage cars and some American models.