Quaife F23 Limited Slip Differential ATB LSD Vauxhall Astra MK4 GSI – FULL KIT! RT Quaife Engineering Ltd is a global leader in the performance automotive drivetrain industry, supplying motorsport users, volume OEM and commercial customers with a wide variety of precision engineered products for cars, motorcycles and specialist use vehicles. From clubman rallying up to Formula One, tens of thousands of automotive and motorcycle users depend on Quaife products to maximise their vehicle’s performance on a daily basis, including sequential gearboxes, automatic torque biasing differentials and associated drivetrain components.