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Old 05-29-2018, 11:48 AM   #19
hammdo
'It's an experiment'
 
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Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE
Join Date: May 2014
Location: Dallas TX
Posts: 8,694
I have headers, cat less, and h-pipe with magnaflow mufflers and no issue with NCM’s noise restrictions. I’ve run there 4 times...

-Don
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