Originally Posted by MikeE92M3
Yeah this is my minor issue right now. Granted, I came from a completely catless, resonator-less Nismo 350z and this is quiet as hell compared to it, but I know the drone is there. I am looking at swapping out the OEM resonators with the Aero AR25 and replacing the X pipe with something more high quality. I think this combination will quiet down the drone to an almost nonexistent amount.
And By X pipe I mean replacing it with the Magnaflow 10791 Part. The opening is at least a half an inch greater than the oem one, which is seemingly crushed. The guy who owns the muffler shop by me is a relative of the Hendricks Motorsports team and he says while the stock set up is great, the X pipe is shitty. It's a simply 60 dollar fix that will hopefully clear it all out. I've invested only $375 overall in getting the secondary cats taken out and replaced with straight pipes, and the mufflers bought/installed.
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.