Celica Forums General Discussion Exterior 2004's is there a difference

i just got an o4 gts and i wanted to know if parts made for the previous years (o3' 02') will fit on the newer celicas

...just bout er-tang but the header...y you ask??? there is the egr vlave that runs air injection to the xhaust manifold(header)...liitle round object right next to the dip stick...hopefully TPR is cuming out w/ a performance headerthat accamodates the air pump...hopefully