RPi's Ram Air Scoops utilize your factory intake system and converts it into a ram air type. RPI's ram air scoops push outside air into the stock air box, providing improved airflow to the well designed OEM intake system. Scoops are available in black or red. Also available is the Ram Air Induction Kit that includes a BMC filter. Tested on a Dyno Dynamics w/ a Patterson 13kcfm fan at 8ft, 2.5degree fan angle on 2011 M3, a 4-6whp gain can be expected with the scoops alone and a 6-10whp gain with the scoops and filter.
Here is a DIY: http://www.raceprecision.com/forums/....php?f=7&t=390
with free shipping within the US
Please contact myself, or joe@trinityautosport for orders and inquiries.