Add to Cart Quaife Audi S6 (01E) Quaife Atb Helical Lsd Differential, Qdf8Q-2 $1,910.53 Quaife ATB Helical LSD differential for Audi S6 (01E) is a direct replacement for the standard Audi open differential, the Quaife ATB Helical LSD differential transforms your car’s performance. Unlike a conventional plate-style limited slip... $1,910.53 Add to Cart