i own a 94 celica gt 5s-fe, and i was wondering would it be a good idea to port and polish my engine, and will this give me a pretty good increase in power??
with the headers and full exhaust?

if ure doing it ure or not spending that much then go for it
but i heard it can get very expensive
oh about hp gains im really not sure bout that but it wont be that high since u have an N/A engine

if u port and polish a turbo car its a waste of money, a port and polish is for N/A cars because u want air to flow more but with forced induction its not needed since its pushin a but load of air into the engine. i know this because i was askin questions to a performance shop all week. if u want power out of a port and polish then get a bigger throttle body with a nice intake and u already how a header and exhaust right?

yea, i plan on getting header and exhaust