Quaife Toyota GT86, Subaru BRZ, Scion FR-S ATB DifferentialQuaife ATB Differential To Fit The GT86, BRZ and FR S Models. The Quaife Automatic Torque Biasing Differential enables your car to accelerate quicker and corner faster. How? Simply by getting the power to the ground! The differential powers both drive wheels under nearly all conditions, instead of just one. With an normal open differential, fitted as standard on most cars, much precious power is wasted through wheel spin under acceleration. This