The lateral axis around which a vehicle pitches fore and aft.
Y-Block
The block of a V-type engine having a deep crankcase.
Y-Pipe
A Y-shaped pipe, such as an exhaust pipe, that merges two passages into one.
Yaw
The Z-axis.
The rotation of a vehicle structure around a vertical axis.
Yellow Bumper
A freshman driver in NASCAR competition. Also known as yellow tail.
The color of the rear bumper of a first-year driver's car in NASCAR competition.
Yellow Flag
A signal to drivers that there is a hazard on the track in closed-course racing. Also known as yellow light.
Yellow Light
A signal to drivers in closed-course racing that there is hazard on the track. Also known as yellow flag.
Yellow Line
A line that separates the apron from the race track.
The rev limit of a tachometer before reaching the red line.
Yellow Tail
A freshman driver in NASCAR competition. Also known as yellow bumper.
Yield Strength
The amount of force that can be applied to a material before it bends or breaks.
Yoke-Sleeve kit
A kit that may be used to rebuild the yoke.
Please note that the definitions included in this Auto Glossary reflect the manner in which these terms are used on the Duipee.com website, which in some instances may differ from their meaning in other contexts.