|  | | NX Mechanical Pressure GaugeFits on the -4 lines by the bottle to read pressure. Liquid filled for accurate readings.
| | | NX Electronic Pressure GaugeDon't want a gauge that you have to go look back in the trunk to read? Here is a 52mm gauge from NX that allows you to read bottle pressure anywhere you want.
Don't lose a race because you didn't know you were almost out of the juice.
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