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Slight drone at the lower RPM's no big deal. Cruising speeds of 70-75 no drone at all pretty quiet. I love this exhaust it is amazing. It is loud when you want it to be and quiet when you are cruising. It is the perfect exhaust for what I was looking for and plenty of compliments along the way.
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08 E92 AW M3 | HRE P40 19" | APE Air Filter | BMW Performance Grills | White Side Gills | CF Mirror Covers | BMW Performance Pedals | F1 Pinnacle Tint | V1 Hardwire | Dinan Performance Software | Gintani Exhaust | H&R Sports Springs | RPI Scoops | BMW CF Spoiler | Challenge Diffuser | Lux H8 V3 | LCI Tail Lights | |