How many catalytic converters does a Audi 2001 a6 have?

What is the firing order for a 6-cylinder Hercules flat head? What does smoke from a diesel engine on start up mean? Where can one purchase Chevy Decals? Where is the turn signal relay located for the Suzuki Esteem? What should you do to reduce the pressure on a fuel line of a forklift? Where is the crank shaft sensor in r129 Mercedes? How do you change a fuel pump on a Lexus es300 1992? How do you replace the water pump on a 94 Saturn sl1? What is the difference between light oil and diesel oil? 1997 Ford Crown Victoria mold smell from vent how do you get it out? Replace headlamp on Nissan Xterra? Where can one get ATV tires for cheap? Is antifreeze needed for heating system in car? Where is the crankshaft sensor on a 1992 3.0 liter Toyota engine? The component in the cylinder head that holds a valve in place and prevents the valve stem from moving side? What is the meaning of this code p0018 on a 08 Mercedes Benz gl450? What does chicken smell like when its bad? How do you change spark plugs on a 2000 Chrysler Concorde? What type of antifreeze for 2000 Buick la Sabre 3.8 liter use? How do you do a power steering fluid flush on a 98 dodge neon?