X5 M Turbo broken?

[m5james]

Cold idle, yes. After it's warmed it, the only difference I notice is a little drone when the truck is trying to hold a high gear going uphills. The exhaust system is pieced together from what MSR does on his new custom exhaust system, but since they only make M5/M6 stuff, he told me what they use. F10M5Manual told me it's got zero drone but you can really hear the turbos out back, so I can only hope it'll sound the same on an X5M. Having done a resonator delete and Magnaflow mufflers on my 740iL with drone so terrible that it sounded like a speedboat on the streets, I've learned my lesson and won't keep any system if it drones too much

[mirob]

Originally Posted by m5james

Cold idle, yes. After it's warmed it, the only difference I notice is a little drone when the truck is trying to hold a high gear going uphills. The exhaust system is pieced together from what MSR does on his new custom exhaust system, but since they only make M5/M6 stuff, he told me what they use. F10M5Manual told me it's got zero drone but you can really hear the turbos out back, so I can only hope it'll sound the same on an X5M. Having done a resonator delete and Magnaflow mufflers on my 740iL with drone so terrible that it sounded like a speedboat on the streets, I've learned my lesson and won't keep any system if it drones too much

Are you getting any exhaust smell in the cabin with the gutted cats? Was it hard to do?