[LAP1DOUG]

It sounds like you have made up your mind what you want, so I will not try to dissuade. I do not have this set up, but can offer the following info:

1- Sway bar stiffness is a function of the 4th power of the bar OD, so the OD is all important, and a solid bar will not be much stiffer than a hollow bar. Purchase Fred Puhn's excellent book, and you can calculate it yourself.

2- According to my set-up notes, my 986S had originally a 24 mm front bar, and 19 mm rear bar, so I don't see this set up being much stiffer than my original stock set-up, but yours may be different. According to my calculations, my original stock bar had a stiffness of about 330 lb/in. For reference, the GT3 front bar at position 1 of 5 (softest setting) is about 430 lb/in. You can get the dimensions and calculate the H&R bar for comparison.

3- The way I see it the real advantage of a front bar on these cars is camber control needed due to the poor camber curves in roll with a McStrut suspension. Adding stiffness in the front should reduce understeer up to the point where you have the best camber control you can get, then after that weight transfer effects take over, and it will start to increase understeer. Trial and error is needed to find this sweet spot.

4- I don't really see what changing the rear bar is all about.

Good luck