4 Wheels - Motorsport. Setting the adjustable switch: Remove the rubber plug in the top of the sender. At the bottom of the hole is a hex nut. Turn clockwise to increase pressure, counter-clockwise to lower.
Longacre Universal Low Oil Pressure Switch - 1/8 NPT Thread - 20 Psi Fixed
Longacre Universal Adjustable - 0-50 Psi Low Oil Pressure Switch
Longacre Universal Low Oil Pressure Switch - Adjustable - 0-50 Psi
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12V Electric Fuel Pump Universal Inline Low Pressure Gas Diesel 2.5-4psi HEP02A
YONEDA Universal 12V Low Pressure 2.5-4 PSI Gas Diesel Inline Electric Fuel Pum