My new '16 LT with V6 doesn't have a red line on the tach I can't remember the last time I had a car that didn't show a red line. Wait, yes I can. My '67 Beetle because it didn't have a tach. After that I'm pretty sure every car that had a tach had a red line. And usually a yellow zone preceding the red zone. Even those with automatic transmission, which I always thought was pretty unnecessary. But my new 3.6 with DI and VVT and all the other modern engine bells and whistles doesn't have a red line on the tach. Do I need one? No. Just surprised that there isn't one nowadays since most cars had one for the last 40 years.