Ford's new Focus RS comes equipped with Quaife's traction enhancing automatic torque biasing (ATB) differential as standard equipment, marking a significant OEM success for the Kent based ...

While there are technically two LSDs available, we could only locate one: the Quaife Automatic Torque Biasing (ATB) differential.

The big news in the Phase 1 tuning kit is the $1,099 Quaife ATB differential that helps maximize traction, minimize wheel spin and torque steer, and is maintenance free.

My favorite upgrade, however, is the Quaife ATB differential. Priced at $1,099, the helical limited-slip diff is said to improve cornering over the standard differential of the Focus RS.

The Peugeot 205 GTI is widely regarded as one of the greatest hot hatches ever produced and British specialist Tolman Engineering has just unveiled its first customer-ordered reimagination of the ...