metalmorfcustoms

hi guys, ive got a 1995 scubby import impreza, tdo5 turbo, full hks pipe and z4 ecu, wot else can i do to it to get sum nice bhp increase?? im not rich lol so i know i could go for cams etc but is there anything else that i could excuse the term bolt on? im also going to get it re-mapped, and i noticed it had the standard manifold on it, if i ge a stainless 1 wots better equal or un-equal?? i read un-equal get the right bank hot???