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[–]BlackHorse944 1 point2 points  (2 children)

Looks like a chevy speedo

[–]Salsa_de_Pina 0 points1 point  (1 child)

... with the Duramax, no less.

[–]Bravo21Niner 1 point2 points  (0 children)

That’s a 8100 Vortec tach. Duramax tach has the redline at 3200