What black plastic? Theres the clear then the guages themselves. You just need to oull the guage faces off and then slide the new ones in. Just make sure to REALLY be careful with the guage needles when you take them off. Some are stuck good but you just have to pull hard. But DO NOT turn them it will mess up the needle positions. Atleast on the oil, fuel, and coolant. The speedo and tach are easily adjustable by moving them all the way to 0.
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