Mechanical Boost (15 or 35 PSI) - 2 1/16 inch Cutout $71.10 Mechanical Fuel Pressure (15, 60, or 100 PSI) - 2 1/16 inch Cutout $71.10 Mechanical Oil Pressure (100 or 200 PSI) - 2 1/16 inch Cutout $71.10 Mechanical Vacuum/Boost (0 - 30 In/20 PSI Boost) - 2 1/16 inch Cutout $71.10 Mechanical Water Pressure (15 or 35 PSI) - 2 1/16 inch Cutout $71.10