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      01-20-2012, 06:10 PM   #4
Cal@Sonic MS

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Drives: bmw
Join Date: Jan 2011
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Originally Posted by ucla bruin View Post
So the 2 axle backs, although look the same, are internally different and sound different?
That's correct. The GT unit is discontinued and currently on clearance sale I believe. The RPI GTM superseded the GT unit.