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31 Posts
I bought Stromung for my 2006 Z4MR last summer and love them. Sound is a deep rumble - not too loud and the install was a simple DIY. If you are on the fence - GO FOR IT.
 

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Rad Racer World Champion
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549 Posts
I've always wanted RE Diablos for the deep rumble, but I'm put off by the price. How do the Stromung compare?
 
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