Autometer GM Bowtie Black 5in 10000 RPM Pedestal Electronic Tachometer w/ Ext Shift LightSince 1957, Autometer Has Set The Standard In Performance, Accuracy And Durability With Their Legendary Tachometers. The Absolute Pinnacle Of Engineering And Technology, Its No Wonder Autometer Can Lay Claim To More Motorsports Victories Than Every Other Gauge Manufacturer Combined. The Patented Air Core Meter Movement, Wound In House To Exacting Standards, Can Move The Needle From 0 10,000 Rpm In 333 Milliseconds. An Ultra Bright Shift Light