i have a racing beat strut bar that dont fit, its about about couple of cm off.

 

Couple of centemeters? That seems like an awful lot. Jack the front of the car up from the center, this will let the unibody settle out level, and should give you the extra bit you need to put it on. Its not unusual for it to be off very slghtly, but a few cm is alot. Has your car ever been in an accident?

 

rear or front??? I just had the lovely task of installing the rear strut tower bar and that was a bitch off by inches not centemeters.

 

Couple of cm = @ 7/8". After a period of time, as stated above, the strut towers have a tendency to "come in". This is why a strut brace should have been part of the assembly process.

 

Could also mean the strut tower mounts are bad. That was my case.

 

from what i know of the car has not been in any accendent and the strut bar is for the front

 

uhhh... unload the front suspension (jack up the car) and try again.

 

Yeah my cusco didnt fit on the front because of the mounts being bad. Just normal driving over the period of 10yrs can damage them too.