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Old 01-10-2002, 07:10 PM   #12
429mustang
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Join Date: May 2001
Location: westerville, OH USA
Posts: 618
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whats the advantage of a box upper over a regular style upper?
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1990 Notchback: BBK Ceramic Coated Full length headers, Dr. Gas 3"- 2 1/2" x-pipe, Flowmaster 40's/turndowns.
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