Hi I have just bought a 2011 SP25 and I am thinking of upgrading the sway bar/s.
I have read that they respond to a thicker REAR bar and leave the front std.If you have experience I would appreciate your advice.
Cheers
Steven

 

I have a Mazda 6 and i did change the rear to a thicker bar. The front is quite labor intensive, so matching the thickness of the rear to the front gives a good result. However, when upgrading sway bars you must also upgrade the sway bar endlinks as the stock ones can't handle the extra force. Endlinks sold here: AWR
"These kits come with a Metric through bolt instead of a stud arrangement like our factory replacement kit AWR-3305R-M3. This allows the adjustable end link kit to accept sway bar that have thicker ends where the end link mounts. Will work with all larger rear sway bars. This kit is not necessary for factory and factory style rear sway bars."

I don't see anything available for 2011.