See also:

The Ultimate Performance Subaru
The 2011 WRX STI continues as the ultimate-performance Subaru with its high-boost 305-hp turbocharged/intercooled 4-cyl. Boxer engine and 6-speed manual transmission. The STI also features Multi-M ...

Recommended spark plugs
Refer to “Electrical system” F12-8. ...

Turbo models
1. Use a screwdriver to undo the clips on the air intake duct, then remove the air intake duct. 1) Connector 2) Clip 2. Unplug the connector that is attached to the top of the air cleaner case. ...