2005 B6 Audi S4 Avant Dyno (Video) 1 discussions This is my 2005 Audi S4 Avant 4.2L V8, naturally aspirated on the Team Valvoline DynoJet. Engine mods: Revo tuning, Stratmosphere Hyperflow air intake and Fast Intentions Fullback exhaust system. Enjo.. Tags: audi s4 avant wagon station b6 b5 v8 4.2 fast intentions fullback exhaust stratmosphere revo chip ecu tuning