<center><img src="http://pictureposter.audiworld.com/711/90smafinlet.jpg"></center><p>My sons friend drove down from Boulder today and we removed his cut-down K&amp;N cone filter that he'd been using as his MAF inlet horn.

Slid in the new one and worked like a charm. I'm still a week-10 days out on the finished product as I'm having a custom die made to get a little more efficient flow at the inlet flair coupled with more inlet velocity.

This inlet will have over 500% more length than the stock airbox outlet and all of it a polished, one-piece design for far smoother and higher velocity thru the MAF and into it's sensor wire. And when pushed into the airbox it can either sit flush up against the MAF screen retaining ring or against the MAF screen seat when running without a screen.

First pic is stock 90S airbox lid

90S airbox is almost identical to the A4 airbox so fitment on both cars is a no-tools project. Simply unsnap airbox lid and push in by hand. Additionally there's a wrap of 3M black high-temp vinyl electrical tape around the inlet O.D. where it slips into the airbox outlet to form a vacuum/pressure-tight seal so no air can be sucked from around the flared inlet.

<center><img src="http://pictureposter.audiworld.com/711/90smafhorn.jpg"></center><p>Literally a 2 minute job!

<center><img src="http://pictureposter.audiworld.com/711/90shornlength.jpg"></center><p>
This pic shows the protrusion of MAF airhorn where it exits the airbox lid and sits flush against the screen, or screen seat if running without a screen.

Fine work!

Mike

attached directly to the MAF inlet while retaining the sealed system cold air benefits of the stock air box. Also provides enhanced throttle response and likely some increase in power tho a dyno run with/without inlet horn will be done soon by an independent person using this set-up. Prevents CEL's in stock airbox cars running without a MAF screen which in recent posts, by most accounts, seems to indicate at least some perceptible increase in throttle response and better high and/or low-end power. It flows over 18% more air than just the hole in the top of the airbox lid and at a higher velocity.

An option for those wanting to retain the stock airbox while increasing induction flow.

one.