ha - power delivery to sit and bag up the front wheels maybe
benny - have you driven a Gt4 out of curiousity ?
Anyway - by the time you buy a 3sgte , get the ECU to work with it - strengthen the clutch plate to deal with the extra power AAND have all this gear fitted - you could have sold the St162 - and bought a St165 - with all of it already done And two extra wheels
BUT if you still want to do it - well - Check the other thread !