FYI:
I have just learmed that the M coupe` rear sway bar is SLIGHTLY larger than the M roadster rear sway bar which is conciderabily larger than the ti 'sport' rear sway bar. (they also carry different part numbers) I have no idea if the 'sport' rear sway bar is any larger than the 'standard' rear sway bar.
The end links for the ti and M roadster carry different part numbers, although I could not find any major differences between them. Slightly beefier, but I do mean slightly.
I mention this because these sway bars bolt directly into a ti with only the bushings and clamps (where it mounts to the body) to be changed.
NOTE: If the car is cornered hard, there is a chance of trailing arm damage from the stiffer sway bars. If you plan to do serious driving, either upgrade the trailing arms or add stiffening/reenforcement to the stock ti trailing arms.
Have fun!
J!m | 
Threaded Mode