Add to Cart Quaife Alfa Romeo 147 Quaife Atb Helical Lsd Differential, Qdh2K-7 $840.31 Quaife ATB Helical LSD differential for Alfa Romeo 147 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... $840.31 Add to Cart