chazmtb is right you have the 2.8eta engine, thats the same with mine. is yours 5spd? mine doesnt top out at 5k rpm it tops out like at 5500!!! and chaz is also rite about having alotta torque, which is good to get an early lead on civics.
vleivo well it aint that easy just to throw the 325i head!! see the 325i head has a domed piston in it thus causing higher compression in the 325i, but the 2.8eta engine has flat top pistons, so if you end up changing the head with out the pistons then you will lose compression and power. if you go that route you will want to change the pistons as well.
yes i was interrested in doing this as well but i just decided to get my e92 instead so my pops can get his bmw back!!