My shop had my exhaust just off while they were working to fit my new Eisenmann Race and the shop mgr said it sound loud and bad but had so much resonance without the mufflers that he doubted I'd like it very much and long IF I drove it regularly that way.
I concur! Louder is not always better guys...remember that!
GL with our project.
'12 F10 550i (Dinan Stage 5/Intercoolers, CF Intake, Brace, Shockware, H&R Springs, Eisenmann Race Exhaust, CF rear difuser, Giovanni "Lindo" Graphite 20")
'10 e71 X6 35iDrive SAV (Space Gray) - Gone
'06 e85 Z4 M Roadster (Black Metallic) -Gone
'08 e92 M3 coupe (Sparkling Graphite) -Gone