A400

http://www.autospeed.com/cms/article.html?&A=0646

Ray Khan

but I have such bad luck with MAFs and the intake system to want to mess around more. I am going back to a stock airbox soon and I will try removing the flap and maybe running a tube to it to get more air in. I doubt I will try removing the MAF screen tho.

KenK in TX

<center><img src="http://pictureposter.audiworld.com/10477/velocity_stack_and_descreened.jpg"></center><p>...improves throttle response across the board, and it's especially noticeable at higher speeds and/or rpms. There's a slight change in sound, but I cant articulate it better than saying there's more of a low pitched "growl" under wide open throttle. Things apparantly sound different from the outside too, even at idle - I have no clue why.

No CEL's and the car idles like a purring kitten. The only downside is that the throttle is way more touchy now, so I'm trying to relearn that. (Its like switching from a car with dismal brakes to super grabby ones.)

cuatrokoop

"urS4" mod? Looks like his work at least. Thought he was only doing stuff for the 12v's though?

KenK in TX

...and the stage3 maf housing will work for some of the earlier 30v's too.

He's bringing 30valvers into the fold, and I recently saw a post where he was looking for S4 testers too. (cant recall what it was for though)

He's a great guy with a crapload of ideas, products, and know how...all topped off with obsessive/compulsive attention to detail.

A400

Audi did this on the URS4's from the factory. Just smooths out airflow into the wire to reduce turbu