TBB upgrade, Forge DV's, APR or GIAC chip (you can search archives for info on differences and pros/cons of each. I have APR, no problems here. Good luck, oh and check your suspension, not sure if that is affecting your body roll or loose front end. Upgrade to sport for minimal $$, again search archives, many will say STFA, Im sure you will get the idea.

'01 A6 2.7T Quattro
Performance: APR Stage 1 ~ APR Cat-back ~ EVO V-flow CAI ~ Vogtland sport suspension (Koni's) ~ H-sport sways front/back ~ Bridgestone Potenza RE760s 235/40ZR18 (summers) ~ Tip00032 ~ Apikol snub mount
Reliability: Samco TBB ~ Samco Upper Boost Hoses ~ Forge DV ~ Elf Synth w/ MANN ~ 93oct ~ Mintex Pads/R1 Concept Rotors ~ ATE SuperBlue ~ Timing belt/Valve covers/and plenty more (trust me).
Eye candy: 18x8 RS6(Achtuning reps) ~ RS6 trunk lip spoiler ~ OEM grille =) ~ B-Raudi6 Deutsch front tag ~ Smoked side markers ~ 30% Tint ~ A6 All-season rubber mats ~ LEDs-reds/hyperwhites ~ Smoked plate cover/Quattro logo frame ~ A6 debadged- 2.7T Quattro relocated to drivers side.
Future plans: Clear Corners, Milltek DPs, x-pipe catback, AWE ICs,