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The Reliance Masstech 4:1 straight through ratio adapter reduces rotational speed by 75% — delivering 1 revolution out for every 4 revolutions in
Nut is 3/4 - 20 Vintage Threading
Metal construction
Available Variants
DATCON 3 3/8" Tachometer 0-4000 RPM with Hourmeter | 103757 chrome bezel The Reliance Masstech 4:1 straightDATCON 3 3 8" Tachometer 0 4000 RPM with Hourmeter 103757 Track engine speed and total operating hours with confidence using this genuine DATCON tachometer. The 103757 is a professional grade 3 3 8" gauge built for demanding commercial and industrial applications, delivering accurate RPM readings alongside a built in hourmeter for comprehensive engine monitoring. 3 3 8" gauge diameter for easy dash integration 0 4000 RPM range ideal for diesel and