[conte]

Dear all, I'm writing from Italy.
The reason why I contact you, is that due to fiscal reason, in Italy 99% of the 5 serie is diesel engine (gasoline), while I'm one of the very few who bought a 535i...
And, I'm probably the only person in Italy who installed the M-Performance exhaust (in BMW they didn't know what I was asking...)
But I'm not satisifed at all of it.. Because it drone sooo much at 2000/3000 rpm, especially at cruise speed 130 km/h (the speed limit in italians highway).
I installed it few days ago, and I would like to ask you if it is normal and in the future it will disappear, or it will remain like this. Could you help me?
Thank you!
Ciao

[FenixMike]

The resonators may break in a bit, but louder exhaust tends to drone on any car around 2,000 rpm. Easy fix is manually downshift a gear so its not at that RPM, the permanent fix is have a muffler shop install a resonator in the center of the exhaust somewhere. The Magnaflow Magnapack mufflers work great for this and can be had for about $60 online, or the cheap way out is a glass pack style resonator which runs about $20, but on a BMW, id rather have a nice stainless magnaflow.

[conte]

Originally Posted by FenixMike

The resonators may break in a bit, but louder exhaust tends to drone on any car around 2,000 rpm. Easy fix is manually downshift a gear so its not at that RPM, the permanent fix is have a muffler shop install a resonator in the center of the exhaust somewhere. The Magnaflow Magnapack mufflers work great for this and can be had for about $60 online, or the cheap way out is a glass pack style resonator which runs about $20, but on a BMW, id rather have a nice stainless magnaflow.

Thank you FenixMike! I will follow your suggestion of a Magnaflow.

[bake]

I have the M Performance exhaust on my 535i as well. It does drone a bit below 2000 RPM. If you put the car is Sport Mode it keeps your RPM above 2000 and there is no drone. That is what I do 99% of the time.

[conte]

Originally Posted by bake

I have the M Performance exhaust on my 535i as well. It does drone a bit below 2000 RPM. If you put the car is Sport Mode it keeps your RPM above 2000 and there is no drone. That is what I do 99% of the time.

But when I make a long trip it's more convenient to be in 8° gear.

[dan the man]

That's about the gear or alcohol contain?

Originally Posted by conte

But when I make a long trip it's more convenient to be in 8° gear.