Thread: Ej25d
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Old 10-11-2012, 09:54 PM   #12
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Member#: 222708
Join Date: Sep 2009
Location: Towson, MD

First off the 255/257 headgaskets are thinner than the stock ones so they would raise the compression.

Second if you want the subachad pipes then you would need both the up and down pipes and a shop to make you the cat section to bolt to the midpipe.
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