Glossary of Terms
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U
Undertray (Belly Pan) --
A part that attaches to the underside of a car and smoothes airflow to offer driver protection in that particular area of the car.
Unibody --A type of construction in which the body of the car is a single unit with all of the separate parts that create the body permanently fastened together.
Universal Joint --A mechanical drive train component that allows a change in the axis of rotation in a drive line or axle.
Unswept Volume --The internal volume between the cylinder head and the piston when they are at their nearest point.
