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19 Posts
I've been on you tube tha past couple of weeks and been searching under 2008 ss impala.a lot of videos pop up but a few have gotten my attention.now has any 1 put a 3 in down pipe on a newer impala and wat kind of improvements have they felt with this upgrade?they also run a k&n cold air intake and on a quater mile running in the low and mid 14's...any 1 have any answers on this,please help...thanks