Add to Cart Quaife Fiat Barchetta Quaife Atb Helical Lsd Differential, Qdh2K-22 £675.00 Quaife ATB Helical LSD differential for the Fiat Barchetta is a direct replacement for the standard Fiat Barchetta open differential. The Quaife ATB Helical LSD differential transforms your car’s performance. Unlike a conventional plate-style... £675.00 Add to Cart