Honda Automobiles 2008 Civic Si Coupe Owner's Manual page 294

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The engine number is stamped into
the engine block. It is on the front.
The transmission number is on a
label on top of the transmission.
Table Of Contents
Except Si
Si
2008 Civic Sedan
Identification Numbers
ENGINE NUMBER
AUTOMATIC/MANUAL
TRANSMISSION NUMBER
ENGINE NUMBER
MANUAL TRANSMISSION
NUMBER
291