In every N54/N55 is plagued by the constant carbon build up on intake valves,and with every mile driven the build up is progressively worse.

 This causes:

Issues with drive ability

Loss of power

Idle inconsistencies

Emission concerns

This can be seen here in macro detail. (Before/After)

Make your appointment with PSI now for this cleaning.

 http://www.precision-sport.com/contact_us

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