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Old 03-31-2013, 11:58 AM   #43
Scooby Specialist
Member#: 289470
Join Date: Jul 2011
Chapter/Region: MAIC
Location: West Chester, PA
2010 Forester XT


Originally Posted by 20satinwhitebeast13 View Post
What's the use of the box and the aem filter doesn't have one so is the amount of air each one build up different
The box acts as a heat shield (although a rather poor one). It's definitely a good idea to have.

The AEM doesnt have one because its a cold air intake and the piping routes the filter into your fender.
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