Here's what I've done to my car.

 

 

I've tried three different air intakes on my car. And at this point, I'm wishing I hadn't. I am still a firm believer in well designed air intakes. The problem here is that for the B6 S4, there is no such thing as a "well designed" air intake. All of them are wrought with openings and wide gaps that allow the million degree engine bay air to be ingested by the intake. Even if the stock airbox is more restricted, it is a sealed enclosure that allows no hot engine bay ir into the system. So, my advice... Add a K&N drop in filter replacement and call it a day. $49 vs. $350.

 

The cold air intake I'm currently using is also the most expensive unit out there at about $850 before shipping from Japan.

 

Here's a thief making off with a part before I had a chance to install...

 

 

Here's the pre-installed intake body. Very nice carbon fiber work, btw.

 

 

Lastly, here's the installed intake.

 

 

 

 

Like the intake, this is my third exhaust system. My first exhaust system was a Labree exhaust and what a beautiful piece it was. Fully polished, beautiful welds... I loved it. But, it was too loud for me. So I went to a Milltek resonated full exhaust. Quality was not nearly as nice, but it was quieter. Problem was, it was too quiet and the sound quality was not well defined, just muffled. So I figured if I wanted it done right, I'd have to do it myself. I kept the Milltek downpipes, cut the last 6 inches or so before it went from 2 1/2" to 2 1/4" and had Mufflex in Trenton, NJ fabricate a nice 2 1/2" exhaust using a Magnaflow X chamber and Flowmaster Delta Force mufflers with Magnaflow 4" tips. The result is beautiful and sounds like nothing you've heard. The sound is downright musical.

 

Some vids:

 

 

 

 

 

 

 

 

 

 

 

 

Computer was flashed with GIAC 93 octane programming for a 15whp and 15 lb/ft toque gain.