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Old 04-25-2017, 06:45 PM   #8
91chevyz28
 
Join Date: May 2005
Location: Dumont
Posts: 231
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Quote:
Originally Posted by Paul Huryk View Post
Ed,

Magnaflow quoted an additional 5 to 7hp with the y-pipe (same for the 3rd gen one they made). I know that the later ones were all 409 stainless and didn't rust all that much - other than maybe the welds.
Thanks for the info Paul on the y-pipe.
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