Related Clues:

• Speed info, briefly
• Car dash abbr.
• 45, e.g.: Abbr.
• NASCAR number
• Measure of a car's 65-Across: Abbr.
• Letters on dashes
• Tach readout
• Auto speed letters
• Speed stat
• LP speed unit
• Engine speed no.
• Dashboard info
• Letters on an LP
• Dashboard data, for short
• 45 or 78, e.g.: Abbr.