i have a 2003 a4 and as far as sound goes i dont know whats the major differance between the 2.
wich is better for my car?

 

Sound-BOV
Performance-DV
But while you are stock, you wouldnt feel that much of a difference in performance between the 2.

 

Forge SPLT-R = both =)

 

i was looking in to the splitter and i read that what it does is you can chose the percentage of air that you want going to atmostphere and the amout that you want to recirculation ...like going 50 50 or 70 30 or juat make it 100% DV or BOV

i read that bovs are bad for audi cars because they send air to atmosphere wich will make audis run rich.
so with the splitter you still get air sent to atmosphere it may be less but you still do so wouldent that still cause your car to run rich?

 

i have a splitter, i have mine cranked down so it it doesnt make much noise but it does get loud if im holding boost. i havent noticed if i was running rich. not really sure how to tell. but my car is a B5 not sure how different is it on the B6

 

There is a whole article on this at:

https://www.audiforums.com/m_531160/tm.htm

General concensus: BOV or DV is fine, the car's ECU will learn and adapt, *if you have a MAP car*. Otherwise stick with strictly DV.

 

Sublime hit it right on the head. I'm running a GFB Hybrid D-BOV very much like the forge splitter. Right now i'm running completely in DV mode since it's so damn loud with the GTRS and my airbox hollowed out, but i have run it 50/50 before without any issues. like mentioned, the ECU will see that it is running rich and adjust itself.