Thread: HKS Exhaust + Catless DPs = Drone :-(
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      09-20-2012, 09:51 AM   #37
Sered
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Drives: 08 E90 335i
Join Date: Apr 2012
Location: Melbourne, FL

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Quote:
Originally Posted by E90Company View Post
No. Resonators reduce rasp not drone.
No. Resonators can do both depending on placement, length, material, etc
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