Interesting idea, but to really see some benefits, you'd need to do a bit of work inside the airbox. The worst part of the stock airbox is the convoluted tube that runs from the snorkel to the air filter. It directs air in,forward, up, then back. As well, it has the narrowest cross section of any part of the intake pathway. The EVO and other aftermarket intakes eliminate all of this, making airflow more efficient. To keep the cold air part on an EVO, simply extend the sides of the new box so that they seal against the engine cover. I used foam pipe insulation for this.
Garage innovation is a great thing!
