This is a very popular replacement for the factory unit on the 2005-2008 Mustang GT. Are you getting a check engine light for your cam position sensor? This unit will solve the problem caused by diode feedback on the factory alternator. This unit will increase the charging capacity at all RPM Ranges with NO modifications. If you have a 2009 Mustang this will only work if you have a  Motorcraft alternator. If your 09 Mustang has a large black plastic cover on the back you DO NOT have a Motorcraft Alternator.

·          Common on Ford SOHC DOHC and some 3V Applications

·          This unit is a direct replacement with NO modifications  

·          80+ amps at idle (2000 alternator shaft rpm)

·          160+ amps maximum (6000 alternator shaft rpm)

·          The stock belt can be used on original equipment vehicles 

·          Actual Alternator Weight is 15.2 lbs

·          All units are 100% NEW and come complete with internal voltage regulator and pulley