Originally Posted by AndyRoo
I worked it out a while ago....using a 20mm STi rear bar on a WRX is about the same as 18 or 19mm bar. So not worth much over the stock 17mm rear for 04+ cars.
An upgraded RCE rear bar will be a noticeable improvement though.
I've got progress 22mm bars F+R, R on full stiff on F on the lower of the 2 settings... The RCE bar probably would've helped!
(I let a buddy sell it to someone else for more money)