Happy with performance intake performance!
 

Ive got a 1987 325e and got the model E30-A1 Signature Motoring heat shield and the K&N filter for about $140 total (signaturemotoring.com) The power increase is fu%^king awesome and the sound is not any louder except and high RPMs where it howls! Very cool. Whole setup installed in about hour and a half (but I've got two left hands and take a cold beer after every half hour working). :D

I know you live in sunny California but is there any risk of water getting into your intake with that system?

Be very careful with Signaturemotoring, there are many sad stories on the internet about their poor customer relationship management and failing to deliver parts which have been paid for.