I was reading in an article that the stiffest sway bar was the 34mm solid sway bar. 36mm hollow sway bar was the next followed by the 34mm hollow sway bar.
My car supposedly has the WS6 package but I think I have the 34mm bar.
One book I read said that if you have 4 wheel disc in 86, that meant you had the WS6 package. Has anyone had the Solid 34mm bar and the 36mm hollow bar? How can you tell if it is hollow or solid? Can you tap it and hear a difference?

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Zepher
'86 Pontiac Trans Am WS6, LG4 305, 5 Speed, CF DF Clutch,
Edelbrock 1406 Carb, Edelbrock Performer RPM 7101 Intake Manifold.
Edelbrock Open Element Air Cleaner: Flowmaster Exhaust, 160* Thermostat,
Grant GT Steering Wheel, MSD HEI Coil, Taylor 8mm Wires, Leather 96 Camaro SS Seats,
Alpine CD+Changer,Alpine V12 Amps, Premier TS-1040C Subs, Polk Audio highs/mids.
Best ET: 14.94@91.67
High Speed Run: 157mph
WS6 Trans Am

 

First, the WS6 comes with a 36mm hollow bar. The reason for this is that it's lighter. Yes the solid bar is stiffer.

Second, if you can, take it off, then tap it on the ground. It's easy to remove and install, also, if you have to, it will give you a good reason to get some poly-graphite bushings.

All of this info, I've gathered from this site. I could be wrong though.

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'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...