2002 Subaru Impreza Owner's Manual - Page 247

Driving tips running rough (misfiring, backfiring or incomplete combustion), have your vehicle checked and repaired by an authorized SUBARU dealer. D Do not apply undercoating or rust prevention treatment to the heat shield of catalytic converter and the exhaust system. Periodic inspections To keep your vehicle in the best condition at all times, always have the recommended maintenance services listed in the maintenance schedule in the "Warranty and Maintenance Booklet" performed at the specified time or mileage intervals. WARNING D Avoid fire hazards. Do not drive or park the vehicle anywhere near flammable materials (e.g. grass, paper, rags or leaves), because the catalytic converter operates at very high temperatures. D Keep everyone and flammable materials away from the exhaust pipe while the engine is running. The exhaust gas is very hot. - CONTINUED - 8-5