Out of all of the above my choice which i have is the ALTA..
1. it is not Loud you get the "air sucking noise" and it enhances the supercharger noise
2. the ecu is not open to any elements as it will be in the same location and still sat in its same little box as it was.
3. i had the
JCW air box before which was modified by removing the flap and the electronics, yes it was good and you notice the difference in sound and power gains but it still doesnt come close to the ALTA.
the ALTA looks the part and sounds amazing, its one of the best selling AIR FILTER products over in the USA as it is such high quality and a proven product.
