drd vs bbr

i am looking for a quiet exhaust for my ssr. i want to know if any1 has the drd minibike exhaust,if the quiet core will fit in it, and what are the ups and downs of the drd.i would also like to know about the ups and downs of the bbr.please let me no which is better and quieter.i am also interested in other quiet pitbike exhausts if u no of ny.

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