hey all im new here n to owning an audi i have a 1999 A4 B% avant with the 2.5 V6 TDI. im looking at tuning this engine ive looked about the internet an not really found any info on this. i ahve found a few! compaines that swill remap it but that about it? any help guys, on what i can get out of this engine an what companies are best thanks!!