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Old 09-02-2011, 12:26 AM   #1
Scooby Newbie
Member#: 291995
Join Date: Aug 2011
Location: northridge, califronia
2005 wrx
obsidian black pearl

Default will a turbo back exhaust with stock muffler affect tune bad?

i bought an 05 wrx that had a custom tune for 16g turbo, sti pump, sti injectors and sti intercooler with turbo back exhaust with RFL muffler. This was really loud and i didn't wanna get hassled so i put the stock twin pipe muffler on. do i have to change my map?
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