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Old 01-02-2010, 04:22 PM   #3
Bentley78
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Drives: Avalanche Z/71, 2010 Camaro2SS
Join Date: Jun 2008
Location: Hawaii/Phoenix
Posts: 590
I have the exact same setup and am confused myself....it seems to be the 1 7/8 is the way to go, i think 1 3/4 is for forced induction setup, i could be wrong but thats what im taking from other peoples conversations.
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