Z1Motorsports.com has released a helical limited slip differential for the 2014+ Infiniti Q50 and 2017+ Infiniti Q60 cars.
Z1Motorsports Street Pro R190 Helical LSDZ1Motorsports wrote:The Z1 Limited Slip Differential is a helical differential that is a dramatic improvement over open differentials given its considerably greater ability to distribute torque at both wheels. With its internal gear design, it boasts exemplary street manners and is operationally quiet when compared to clutch type differentials that have a tendency to chatter or clunk when cornering at low speeds because of axle bind. The Z1 SP-Pro differential is a helical unit that exhibits no axle bind and provides smooth operation in any circumstance. Seriously, your wife won't even notice you upgraded this thing. Because of the internal construction the Z1 SP is low maintenance (only regular fluid service intervals) and ensures exceptional life span with no special fluids or friction modifiers needed. Standard fluid may be used, however Z1 recommends the use of Red Line or Motul differential fluid found in their respective links to the left.
A major weak link in the Q50/Q60 cars has finally been rectified. Love it.