I've always thought of doing one, but I changed my mind into just a good CAI. However there are two ways I'd do it.
1) Cone filter where battery normally is. Seal off that entire area from headlight to shock tower to make an airtight box. Put Renault Twingo or similar air intakes above the sealed box in the hood. Done.
2) Cone filter where battery normally is. Seal off that entire area from headlight to shock tower to make an airtight box. Duct air up into the box from a high pressure area at the lower-front of the vehicle.
1) Cone filter where battery normally is. Seal off that entire area from headlight to shock tower to make an airtight box. Put Renault Twingo or similar air intakes above the sealed box in the hood. Done.
2) Cone filter where battery normally is. Seal off that entire area from headlight to shock tower to make an airtight box. Duct air up into the box from a high pressure area at the lower-front of the vehicle.