Originally Posted by Chriskm3
mod done. quick and easy. Still detect drone between 1800 to 2200 rpm , above that all has been eliminated. great fix. Driving the car above 2200 rpm simulates stock sound. Thanks for the info. Next off to xpipe or test pipes. I asked if the muffler shop can produce a test pipe eliminating front cats, but was rejected due to emmisions clause. They are not allowed to remove cats due to emmision requirement.
Good to hear! Keep driving and it will get better--that's what I've noticed. Yep, my shop told me the same thing but I am going to bring it to a performance shop to do it for me and do the tune myself. I will get an inspection before I do the test pipes so I have at least a year to play with it.
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.