For use ONLY with the 14mm Colortune. Adapts from 14mm to 12mm size spark plug size. PURCHASE FROM USA DISTRIBUTER SELLING THIS PRODUCT FOR NEARLY 40 YEARS, WITH NO HASSLE WARRANTY
Gunson Colortune / Hi-Gauge Adaptor Kit 12mm G4055B
Gunson Motorcycle Colortune Kit 12mm G4171
Gunson Colortune Adaptor Kit 14mm - Taper Slim G4055C
