Classic Instruments 1957 Chevy Direct-Fit & Tetra Series Gauge Packages have a 4-5/8" quad gauge (140 mph speedometer, 8000 RPM tachometer, oil pressure gauge, and voltmeter), 2-1/8" fuel level gauge (0-30 ohm for 1957 Chevy & 240-33 ohm for Tetra), and 2-1/8" temperature gauge. Available in five styles, packages include necessary sending units, electrical connections, and model-specific mounting brackets. Optional upgrade is an authentic 1957 clock (sold separately).