Besides Chipping and Exhaust, what are the best under the hood mods?

K&N Filter, Air Box Mod, Upgraded Turbo Intake Tubes....what else...are these the best?

 

Big turbo and all supporting mods . Search as to what they are.

 

Diverter Valve

 

Does a Diverter Valve do much for you?

 

or you could tell us what your power goal is. i mean the mods are just as much as any other car for the most part. only thing a4s are lacking is an intake manifold

 

The stock diverter valve won't last long once you're chipped. I have a 710N DV or the one off the TT now. With a Forge 007 in the mail.

 

[:@]

 

I'm not looking for too much. Just some noticeable power gains. If I were to pull up beside another '03 A4, I'd like the advantage...does that help?

 

I assume by [:@] you mean it doesn't do much....

 

ok then put ur basic bolt ons. exhaust, apr chip that has the injector option, forge dv so it can hold the boost, samco inlet hose and all other hoses, DIY intake, short shifter(just makes drivin funner) that'll give ur edge