Add to Cart Quaife Alfa Romeo 166 Quaife Atb Helical Lsd Differential, Qdh6E-5 $983.83 Quaife ATB Helical LSD differential for Alfa Romeo 166 is a direct replacement for the standard Alfa Romeo open differential. The Quaife ATB Helical LSD differential transforms your car’s performance. Unlike a conventional plate-style limited slip... $983.83 Add to Cart