In all actuality, if were you truly reading my post intentions, you'd see that I get quite irritated at this question being asked for many reasons.

1. The archives give the answer, hundreds of times over.

2. No qualifications were made in the post.

3. No other choices were given, and there are many others that should/could be considered.

4. ...

2001.5 Audi S4 6spd, Eibach Pro Street S coilovers, AWE DTS, 710N's, VAST SS, Zoldman O2's, ECS afterrun thermoswitch, Darintake, Vast snub mount, RS4 tranny/motor mounts, Phatbox, ECS magnetic drain plug, VAGCOM mods, foglight mod, GIAC X & Flashloader, Avus wheels painted "Silver Arrow", Neuspeed catback exhaust, Neuspeed 19mm rear swaybar, 35% tint, RS4 grille, Euro headlights, ASP 3" dps w/ test pipes, A-pillar Prosport Performance boost gauge