Please message us prior to placing an order to check we still have them in stock.The stock differential assembly is a torque sensing unit. Although Toyota built a great differential, TRD has designed a better one. The TRD differential is a true limited slip with clutch packs and will work better in a drag racing, road racing or just plain street enviroment. TRD didn't stop there when they made this unit, they built it with much beefier spider gears inside to wistand the added abuse of high HP Supras. This is the perfect unit for high HP Street Supras.Part To 41110-14780/14H06Ideal if your doing a swap from a non-turbo or an Auto TT to the 6spd V160 twin turbo?¾ Or if your swapping the other way around and need an Auto differential? Or, maybe you have a 6spd TT and your diff has exploaded or is damaged or cracked.¾ If any of the above describe you, then likely you need this new Toyota Differential Carrier Assembly, also known as the entire "pumpkin".The price includes the entire assembled unit with a new Toyota differential already installed. You just drop this in and you're done, unless you prefer a TRD LSD as well? That would have to be a separate and additional purchase.We offer both options for the 6spd and Auto as follows: The 6spd UK, Euro & USA Spec is a 3.13 gear ratio and a 12-bolt 220mm ring gear.¾¾ The Auto is a 3.76 gear ratio with a 10-bolt 200mm ring gear.Important note:¾ Some J-Spec and RZ-Spec Supras are the opposite of the USA-Spec Supras. You may call them A Series and B Series. If you want to order this item from us, please verify if you have the 200mm 10-bolt ring gear or the 220mm 12-bolt ring gear. Do not worry if you are 6spd or Auto, that information does not assure you will receive the correct part. We must know if you have the 200mm or 220mm ring gear so we can send you the correct diff.