Related Clues:

• Exhausts — essential parts for cars, we're told
• Michelin products
• Coupe quartet
• Worthless nags
• In very Gallic ambience, one gets fed up
• Quattro's quartet
• Becomes bushed
• Worn-out horses
• Pirelli products
• Skid-mark sources
• Goodyear products
• Stack in a pit
• Firestone specialty
• Michelins
• Auto's four