Traditional 2 1/8" Air Pressure Gauge TR118SLF holleyefi APR's Stage II Pulley ECU

APR's Stage II Pulley ECU Upgrade makes the necessary engine management adjustments to handle the increased supercharger speeds

2 V8 2020 GMC Yukon SLE 325/5

8L 4-cylinder engine

7 V8 1975 Chevrolet C10 454/7

Traditional 2 1/8" Air Pressure Gauge TR118SLF holleyefi APR's Stage II Pulley ECUTraditional 2 1 8" Air Pressure Gauge Features: Rugged air core movement? combined with microprocessor technology for precision and durability Full sweep provides increased accuracy Small 2 1 8" hole size ? Pushbutton calibration Integrated red warning light, illuminates entire gauge red when activated Warning light output for additional warning indicator lights Analog . 5 4. 5VDC output for data logging systems LED lighting, choose between Warm White