Airbox Design Question

I'm no expert, but it couple be for noise suppression or to help with low end torque. Bmw uses a valve on the air box that will open under pressure to allow better airflow. (Some models)

EP32k2 wrote: ↑ I'm no expert, but it couple be for noise suppression or to help with low end torque. Bmw uses a valve on the air box that will open under pressure to allow better airflow. (Some models)

I'm worried the material will like disintegrate into the engine after a winter or two becuase it's not made of plastic...

george__ wrote: ↑ I'm worried the material will like disintegrate into the engine after a winter or two becuase it's not made of plastic...

It's not plastic? What is it? Sponge? Lol

george__ wrote: ↑ I'm worried the material will like disintegrate into the engine after a winter or two becuase it's not made of plastic...

PET plastic or polyethylene terephthalate, is the most common type of polyester
The air intake is designed to provide the most air into the intake. The tubing is basically designed to allow fitment of the airbox within the engine compartment.

It has been my experience that airbox design is more about noise suppresion than anything else. Cut it or take it out and put a filter on the end of it and enjoy your new found power and being able to actually hear your engine.

If you don't want either of those things leave it.

SAVINGSTAR wrote: ↑ It has been my experience that airbox design is more about noise suppresion than anything else. Cut it or take it out and put a filter on the end of it and enjoy your new found power and being able to actually hear your engine.

If you don't want either of those things leave it.

The most amount of high velocity flow for the least amount of noise across the entire power band while complying with Emissions and budget is how I would define it.

The stock intake in many cases is as optimal as they can get it these days, when you're looking at all the factors.
Can you make more power? Sure. That seems to be the only thing people look at when they buy intakes but manufacturers have a lot of to consider when they make their cars. (Temp ranges, the whole power band, rain and snow, ease of maintenance, noise, etc.)