I originally put this over on the CTS forum, as I was trying to find out what the base and Sport CTS swaybar diameters were. I ended up getting the measurements myself from a couple of cars that were at Lindsay when I was there with my car. Still not positive on the CTS diameters - it would be interesting to check the parts database to see if there are different part numbers for front and rear on the base and Sport models. Just seems strange that they would "upgrade" by only 1mm, but that's what the vernier caliper said.
The Hotchkis and Addco bars are advertised in inch units, while the GMPP and Eibach bars are advertised in millimeters, so I converted them all to make them easier to compare.
. . . . . . . . . . . . . . . . . Diam. (in). . . Diam.(mm) . . . Construction . . Comments
Hotchkis CTS-V front . .. 1-1/4 . . . . .. 31.75 . . . . . . . tubular .. . . . . Sold as front/rear kit (2280)
Hotchkis CTS-V rear . . . 1 . . . . . . .. . 25.40 . . . . . . . ?
Hotchkis CTS front . . . . 1-3/16 . . . . . 30.16 . . . . . . . tubular .. . . . . Sold as front/rear kit (2279)
Hotchkis CTS rear . .. . . 13/16 . . . .. . 20.64 . . . . . . . ?
Addco CTS-V front . . .. 1-3/8 . . . . . . 33.66 . . . . . . . solid . . . . . . . 2290
Addco CTS-V rear . . . . 1 . . . . . . . . . 25.40 . . . . . . . solid . . . . . . . 2289
Addco CTS front . . . . . 1-1/8 . . . . . . 28.58 . . . . . . . solid . . . . . . . 2200
Addco CTS rear . . . .. . 7/8 . . . . . .. . 22.23 . . . . . . . solid . . . . . . . 2201
Eibach front . . . . . . . . 1.10 . . . . .. . 28.00 . . . . . . . tubular . . . . . Sold as front/rear kit (3878.320) or individually (3878.310 front, 3878.312 rear)
Eibach rear . . . .. . . . . 0.87 . . . . .. . 22.00 . . . . . . . tubular
GMPP front . . . . . . . . . 1.38 . . . . .. . 35.00 . . . . . . . hollow . . . . . . No longer available
GMPP rear . . . .. . . . . . 0.94 . . . . .. . 24.00 . . . . . . . solid
Stock CTS-V front . . . . 1.04 . . . . .. . 26.50 . . . . . . . tubular (?)
Stock CTS-V rear . . .. . 0.83 . . . . .. . 21.00 . . . . . . . solid (?)
Base CTS front . . . . . . 0.91 . . . . .. . 23.00 . . . . . . . tubular (?)
Base CTS rear . . . .. . . 0.63 . . . . .. . 16.00 . . . . . . . (?)
Sport CTS front . . .. . . 0.91 . . . . .. . 23.00 . . . . . . . tubular (?)
Sport CTS rear . . . . . . 0.63 . . . . .. . 16.00 . . . . . . . (?)
The Hotchkis and Addco bars are advertised in inch units, while the GMPP and Eibach bars are advertised in millimeters, so I converted them all to make them easier to compare.
. . . . . . . . . . . . . . . . . Diam. (in). . . Diam.(mm) . . . Construction . . Comments
Hotchkis CTS-V front . .. 1-1/4 . . . . .. 31.75 . . . . . . . tubular .. . . . . Sold as front/rear kit (2280)
Hotchkis CTS-V rear . . . 1 . . . . . . .. . 25.40 . . . . . . . ?
Hotchkis CTS front . . . . 1-3/16 . . . . . 30.16 . . . . . . . tubular .. . . . . Sold as front/rear kit (2279)
Hotchkis CTS rear . .. . . 13/16 . . . .. . 20.64 . . . . . . . ?
Addco CTS-V front . . .. 1-3/8 . . . . . . 33.66 . . . . . . . solid . . . . . . . 2290
Addco CTS-V rear . . . . 1 . . . . . . . . . 25.40 . . . . . . . solid . . . . . . . 2289
Addco CTS front . . . . . 1-1/8 . . . . . . 28.58 . . . . . . . solid . . . . . . . 2200
Addco CTS rear . . . .. . 7/8 . . . . . .. . 22.23 . . . . . . . solid . . . . . . . 2201
Eibach front . . . . . . . . 1.10 . . . . .. . 28.00 . . . . . . . tubular . . . . . Sold as front/rear kit (3878.320) or individually (3878.310 front, 3878.312 rear)
Eibach rear . . . .. . . . . 0.87 . . . . .. . 22.00 . . . . . . . tubular
GMPP front . . . . . . . . . 1.38 . . . . .. . 35.00 . . . . . . . hollow . . . . . . No longer available
GMPP rear . . . .. . . . . . 0.94 . . . . .. . 24.00 . . . . . . . solid
Stock CTS-V front . . . . 1.04 . . . . .. . 26.50 . . . . . . . tubular (?)
Stock CTS-V rear . . .. . 0.83 . . . . .. . 21.00 . . . . . . . solid (?)
Base CTS front . . . . . . 0.91 . . . . .. . 23.00 . . . . . . . tubular (?)
Base CTS rear . . . .. . . 0.63 . . . . .. . 16.00 . . . . . . . (?)
Sport CTS front . . .. . . 0.91 . . . . .. . 23.00 . . . . . . . tubular (?)
Sport CTS rear . . . . . . 0.63 . . . . .. . 16.00 . . . . . . . (?)