I have the HKS exhaust on my car with stock downpipes and I love the exhaust, best sounding from all the ones I've heard before. But I think it's to be expected that you'll have drone with catless dp's and an aftermarket exhaust. After all, people get drone with the PE and catless dp's and that's a semi stock exhaust.
That's why my goal is to save up enough money to get the AR Catted Dp's to compliment the HKS purrrr
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***2009 Jet Black 335i Coupe***
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