Add to Cart Quaife Porsche 968Cs 6-Speed Quaife Atb Helical Lsd Differential, Qdf10Q $1,217.73 Quaife ATB Helical LSD differential is suitable for the Porsche 968CS model with 6-speed gearbox. A direct replacement for the standard Porsche open differential, the Quaife ATB Helical LSD differential transforms your car’s performance. Unlike a... $1,217.73 Add to Cart