I recently replaced my clutch on a 2003 focus st170 I put in a new dual mass flywheel in cause with a solid flywheel is is very rough at changing the gear as there is to much torque going through the gear box to put a solid one in thats the point in the dualmass flywheel. I have heard of people putting a solid one in only to then replace back in the dual mass. But read up and or phone pumaspeed there good and will tell u.keep us informed on how u get on and what you decide.