Add to Cart Quaife Alfa Romeo 156 2.5 V6 Quaife Atb Helical Lsd Differential, Qdh6E $1,677.76 Quaife ATB Helical LSD differential for Alfa Romeo 156 2.5 V6 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... $1,677.76 Add to Cart