May work great for you if you do not need Callifornia emissions accuracy or are tuning a carborated vehicle.
Gunson GASTESTER DIGITAL #4125 - Co Exhaust Gas Analyzer - SHIPS FROM USA
Gunson 14mm COLORTUNE 4074 - For Carb Tuning - SHIPS FROM USA WITH WARRANTY
Gunson COLORTUNE 4055E - 18mm ADAPTER - SHIPS FROM USA
EXHAUST GAS TESTER CO TESTER BOSCH GENUINE WORKSHOP TOOL
EXHAUST GAS TESTER CO TESTER 12 VOLT NO BOSCH EXCELLENT
EXHAUST GAS TESTER CO TESTER EXCELLENT! ! ! !
