Originally Posted by Vic311
I like the branch resonantors..never seen them on e9x M3.
That is the proper way to tune out drone.
Yes, I think I started a revolution. 1300 miles later, the exhaust sounds so mellow with virtually no drone at cruising speeds. Win.
2008 (07/08) E92 M3 BPM Stage II Tuned by Mike Benvo, 6MT, Turner Test Pipes, Magnaflow Custom Catback Exhaust (Magnaflow X Pipe, secondary cat delete, Aero Resonators and Helmholtz Chambers),Vorsteiner CF Lip, Hamann Style CF rear diffuser, CF Rear Decklid Spoiler, BMW Performance Kidney Grills, CF Side Grills, OEM GTS Wheels, K&N Drop-In Filter, GP Thunder 8k Angel Eyes, Painted Reflectors.