I don't see that many of the Nismo clutches here. The OS Giken's are by far the most common. Those disks look exactly like the OS Giken disks though.... and the cover looks to me like an Exceedy cover. You don't need an upgrade TOB, the stock one will work. The OSG TOB however is the exact same as the Tomei (read: Nismo). It may give the clutch pedal a longer throw.