Are the stock DX/LX/EX sway bars different from the stock Si sway bars?

 

yup, they are skinnier

 

DX/LX/EX : rear sway bar: (11mm)
front sway bar: (25.4mm)

Si: rear sway bar: (17mm solid)
front sway bar: (27.2mm solid)

 

They are wayyy different. Just put them on ur EX and you will be glad you did.

 

I got the rear one on my car and it definetly feels stiffer, too stiff? I plan on getting the front sway bar next. At first I thought just the rear bar so that my car wouldn't understeer but maybe oversteer a little. But now it feels like the front needs to be stiffened. My dealer told me that bushings brackets and front oem sway bar from Si were $81. And I paid $60-70 for the rear set up.