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Brand: Stack Inc
The Stack ST430 Professional Tachometer uses microprocessor controlled stepper motor movement for rock-steady, no waver operation throughout the RPM range. This technology also permits the dial to be compressed at the low end and expanded at the high end for more accurate reading in the engine's normal operating range.
All ST430 models include 25 minute recording for on-tach playback, a tell-tale function, backlighting, switch kit, external shift light, wiring harness and complete instructions.
The ST430 is the same as the Stack ST400 Professional Tachometer, but with a huge 5" dial face. This larger face is a perfect fit to replace the original mechanical tachometer in Porsche 911 and 914 (mounts in a 4.6" / 116mm opening).
Stack ST430 Manual