Can't comment on the front yet, but you're wrong about the rear. I installed the FS bar and I could definitely tell the difference. The FS bar is nice cheap upgrade. If you want to really improve the rear's rigidity, check out this bar: http://www.adamsracing.net/RaceBar.html . This was designed based on recommendations from a Ford Engineer (perhaps SVT, I can't remember) and ties in all the weak spots. It is pricey, yes, but garyk had one in his race car and according to him, it was great.AT1 said:On another car they would help. With the Focus' design, no. The only effect the stress bars have are a placebo effect. The front MIGHT do very liitle to improve stability, but doubtful because the strut towers are already so close to the firewall. The rears would have no effect as the suspension design puts the stresses somewhere other than the shock towers. Get them for peace of mind if you want, but don't expect your car to turn into an instant corner-carver because of them.