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Hey everyone, I'm starting to look into getting an exhaust for my 2010 135i. I currently have catless downpipes but I want my car to sound louder and better. I'm looking at the BMW performance exhaust because it's probably the best priced catback exhaust available at the moment. But being that it's OEM, I want to know if it'll be loud enough. Compared to stock exhaust +DPs, how much louder and better would the car sound with the performance exhaust +DPs? I'm not worried about it being too loud (because it's an OEM product) but I want to make sure that the sound improvements will be worth the money or if I should look into another brand or a custom quad exhaust
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