Originally Posted by carfizzi_07sti
So the wrx has the same size and the sti has different diamaters for the front
Rear coilovers for an 07 STI and WRX are the same. Up front, the STI has larger knuckles so you need specific STI front coilovers.
You need to contact the whoever sold you the Tein coilovers and tell them they sent you the wrong version. Tell them you need STI coilovers, not WRX coilovers, and exchange them.