OS Giken Porsche 997 3.6/3.8L Aisin Trans (MT Only) Super Lock LSD (osgPR121-HA)

This is the OS Giken Porsche 997 3.6/3.8L Aisin Trans (MT Only) Super Lock LSD. Part osgPR121-HA. Differential parts control how power is split between the driven wheels; limited-slip units and solid diff mounts help put power down out of corners.

The OS Super Lock LSD is the culmination of over four years of extensive research and development that led to a revolutionary LSD design with the capacity to house an unprecedented number of friction plates (up to 28 plates in total). Combined with our patented lock timing system, the Super Lock LSD is able to achieve complete lock in a progressive, smooth, and quiet manner, making it suitable for both street and racing performance.

Superior Design

Miniaturized pressure ring and a superior spline-through-side-gear design allows for fitment of more friction plates (up to 2x as many as competitors versions), offering true 100% lock capability.

Patented pressure ring design allows for smooth, progressive locking

LSD case has a relief cut-out for the cone spring, resulting in minimal cone spring degradation and enhanced durability.

Superior Construction

All components are chemically heat treated for maximum durability

All components are constructed from a high-grade steel alloy

Gears are raw-forged for maximum strength

Clutch disks are precision-machined simultaneously on both sides to extremely tight tolerances resulting in minimal warpage.

LSD case is machined from a single billet piece to ensure uniformity.

Superior Overall Performance

The OS LSD standard spec allows for low preload while still retaining a fully progressive 100% lock capability; basically, the vehicle will feel like driving on an open diff in slow turns / street driving, but can still transmit maximum power to the drive wheels under load.

Operation is ultra quiet, and the progressive locking allows for smooth, predictable locking. Especially when replacing an open diff, equipping OS LSD will completely improve the driving experience while maintaining everyday drivability.

Product details

• Part type: Differentials & LSD
• Brand: OS Giken
• OS Giken part number: osgPR121-HA

Fitment

• Vehicle: Porsche 911 (991), Porsche 911 (997)
• Years and trims on file: 2006-2008 Porsche 911 Carrera; 2009-2012 Porsche 911 Carrera; 2006-2008 Porsche 911 Carrera 4; 2009-2012 Porsche 911 Carrera 4; 2012 Porsche 911 Carrera 4 GTS; 2009-2013 Porsche 911 Carrera 4S; 2006-2008 Porsche 911 Carrera 4S; 2011-2012 Porsche 911 Carrera GTS; 2009-2013 Porsche 911 Carrera S; 2006-2008 Porsche 911 Carrera S; 2008-2009 Porsche 911 GT2; 2011 Porsche 911 GT2 RS; plus 12 more on file
• Application listing: OS Giken Porsche 997 3.6/3.8L Aisin Trans (MT Only) Super Lock LSD
• Check the vehicle, model years, engine and trim above against your car before ordering. Not sure? Ask us and we will check it against your VIN.

Shipping & returns

• Orders are processed within 1–3 business days; standard delivery is 3–7 business days within the United States.
• OS Giken parts are supplied through our distributor. We confirm availability and lead time with you after you order.
• We currently ship within the U.S. only. See our Shipping Policy.
• 30-day returns on unused parts in original packaging — see our Return Policy.

Installation at Team ANBD

Team ANBD is a performance shop in Andover, New Jersey. We can align or corner-balance the car, and prep track cars. Book an appointment or ask us about installation and fitment before you order.