Installed one on my '12 Si Coupe today. Parts you will need including suggested retail prices:
52300-TR7-A51 Rear Stabilizer Bar $52.05
93401-10020-008 x 4 Stabilizer Holder Bolts (You can reuse your old ones. I just prefer new bolts on new parts) $1.10 ea
52306-TR7-A51 x 2 Bushing $12.75 ea
52308-TR7-A00 x 2 Bushing Holder $2.33 ea
52317-TR7-A01 Right Bracket $10.67
52318-TR7-A01 Left Bracket $9.72
93404-10030-08 x 4 Bracket Bolts with Washers $1.13 ea
90212-SA5-003 x 2 End Link Self Locking Nut (Again, you can reuse your old ones) $0.57 ea
Shinetsu Grease for the bushings. (Good stuff!)
Here's a size comparison of the '12 and '14 bars
Here's a comparison of the brackets. Notice the '14 on the left is reinforced. I don't recommend using the old brackets. They will bend or tear from the leverage of the thicker bar.
Have fun!
52300-TR7-A51 Rear Stabilizer Bar $52.05
93401-10020-008 x 4 Stabilizer Holder Bolts (You can reuse your old ones. I just prefer new bolts on new parts) $1.10 ea
52306-TR7-A51 x 2 Bushing $12.75 ea
52308-TR7-A00 x 2 Bushing Holder $2.33 ea
52317-TR7-A01 Right Bracket $10.67
52318-TR7-A01 Left Bracket $9.72
93404-10030-08 x 4 Bracket Bolts with Washers $1.13 ea
90212-SA5-003 x 2 End Link Self Locking Nut (Again, you can reuse your old ones) $0.57 ea
Shinetsu Grease for the bushings. (Good stuff!)
Here's a size comparison of the '12 and '14 bars

Here's a comparison of the brackets. Notice the '14 on the left is reinforced. I don't recommend using the old brackets. They will bend or tear from the leverage of the thicker bar.

Have fun!