In reference to DV's I've heard great things about forge as well as APR R1's, though from what I am told the Audi race cars are running the Bosch 710N's (it's our 710B's that fail). Not certain it's necessary to spend 180/ea for forge or ARP but I still hear great things.

As far as the chip check our APR's site, they've got a very good breakdown of their products, especially the chips. I'm told the GIAC is more aggressive but I've yet to look into them. Which set-up you choose will depend on your upgrades and turbo selection.

 

Ok thanks you all have been a great help so far this is a great form. Is the stock turbos on my s4 k03 or k03s?

 

Not sure - i know the 2001 a4's have the ko3s turbo. I think you would get better info from the 'S' section of the forum, but they aren't too nice to newer owners like we are.

DVs: get one from Krauto -everyone here loves them. I personally got an APR r1 diverter valve for a crushing 150 bucks... wish i didn't, but it seemed like a good idea at the time

KRAUTO PARTS One Stop For LEDs HIDs and More

 

You have K03's sir. K04's are OEM RS4 turbo's.

Here's a link to the APR website. Dyno graphs and lists of upgrades to best serve each chip, etc.

APR Audi S4 - APR ECU Upgrade

 

Also, I'd suggest you join s4forum.com, there's a few guys building these up over there and I'm sure you'd gain a lot by reading through some of their build thread. I know I have.

 

Ok thanks again for all the help

 

like stated previously apr and giac are the ways to go. giac is more user friendly and do custom tunes for added mods. i personally have an a4 2001 k04 carbonio intake with the apr stage 1 chip and it rides beautifully. i'd say go with apr over giac but to each their own.

 

Does anyone know we're I can get a good deal on a front mount intercooler kit for a 2000 s4