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2014 640i
Hello 6post community,
I'm new here this is my first post. I own a 2014 640i. The car has the M package. If I wanted my car to have quad exhaust, what would be the appropriate steps to take in order for me to achieve that? I found some nice ones but I'm scared to buy it just in case it doesn't fit or what not. Would I lean towards a diffuser? Thanks!
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