(I know some here dont like Autometer)

Is the light for the Vac/Boost or just Vacuum Gauge a #194???

If you post which gauge series you have, someone might be able to give you a definite answer. But likely all gauges of one series uses the same replacement lamp.

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0==WW==0
"…axles of evil…" - george w. bush

Its the Pro-Comp Ultra-Lite

http://hp.autometer.com/products/product_photos/0044xx/004477.jpg

Thanks... #194 has been confirmed for 2 1/16" gauges