Ordered a few more items for the car this afternoon.
Shorai LFX BMS01 battery charger to maintain and internally balance the cells in my new battery.
MTec shifter springs: I've been wanting a tighter, more direct shift feel as I've been having rare issues on track with quick 5-4 and 3-2 downshifts finding the lower gear with certainty.
Whiteline KDT925 Rear Differential Cradle and support outrigger bushings. I've been noticing the sloppyness of the stock rubber diff bushings more and more since installing the rear subframe lockout bushings. I've read these diff bushings are a nice compliment to liven up the rear end of the car and I've been meaning to get them for a while now.
I figure the shift springs and diff bushings can go on with the new catback all at once on the lift to make things easier.