Subaru WRX & WRX STI Manuals 2016 WRX & WRX STI Owner’s Manual | Page 456

Driving tips/Catalytic converter

exhaust fumes are entering the
vehicle, have the problem
checked and corrected as soon
as possible. If you must drive
under these conditions, drive
only with all windows fully open.
. Keep the trunk lid closed while
driving to prevent exhaust gas
from entering the vehicle.

Catalytic converter

NOTE
Due to the expansion and contraction
of the metals used in the manufacture
of the exhaust system, you may hear a
crackling sound coming from the exhaust system for a short time after the
engine has been shut off. This sound is
normal.

STI

8-3

reduce HC, CO and NOx in exhaust
gases, thus providing cleaner exhaust.
To avoid damage to the catalytic converter:
. Use only unleaded fuel. Even a small
amount of leaded fuel will damage the
catalytic converter.
. Never start the engine by pushing or
pulling the vehicle.
. Avoid racing the engine.
. Never turn off the ignition switch while
the vehicle is