I was thinking about buying a new set of sensors specifically for r1234yf but it seemed like a waste of time. I currently have 4 sets of gauges for different refrigerants. I can say if you have a new car that needs a new coolant, feel free to buy it. Vacuumed under 500 microns and lasted all night with these clutches. I can't be happier. Incidentally, they fit perfectly with the cheaper R134a freight track set. Don't waste your time and money with other kits.
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