Thanks :thumbup:

X5X - they're teasing you a little. They're talking about the OEM setup under the hood and trying to convince you that you already have the best setup so that you don't waste your money. :thumbup:

^^ Dang it, I was just going to take pictures too....

What about upgrade filters?

There really are none. A filter will have to let more particulate past in order to flow more air (given they are he same size/area)... so an "upgrade' in airflow equals a 'downgrade' in filtration.

Plus given the fact that there really isn't much true HP lost in the filter, trading engine protection for a couple of HP seems a false economy.

A

You know how to take pictures, too?? :D:D

I agree that stock is a great route to go...however with proper care and maintenance, there are aftermarket intakes that will suffice...Dinan for example. Unfortunately, Dinan didn't develop an intake for the E70. An intake alone may be useless except for engine growl but coupled with the right modifications, it will make a difference.

As far heatsoke goes, it's a non factor with street level performance, IMO.

This may be worth voiding a warranty...
Diesel BMW Performance | JBD | Juice Box Diesel | BMW Cold Air Intake | BMW 135 Performance

Elevated intake air temperature from cone filters can result in 5%-10% power loss just in regular traffic (underhood temperature vs outside air temperature). Lots of data is available.

I'm aware...Even with such a setup, i believe there are reduction kits that allow the MAF to read real air temperatures. Not my preferred setup as there are much better alternatives. However, the E70 N/A V8 is limited on performance modification alternatives to begin with (let alone the 3.0)...unless one goes with a powerhouse tuner but with that kind of $$ might as well go for an ///M.