Exhaust question
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Joined: May 2007
Posts: 70
From: OC
Car Info: 2007 wrx
Exhaust question
So I was given a muffler recently. I forgot what brand it is but its a canister one the size of a carbon ti. I wanna have it installed at a muffler shop from the axle back. Should I get 2.5" or 3" piping? Which would sound/perform better? Btw I have a stock 07 wrx
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