wow.... GSR ar....
if you want power well.... i think you will get bored with GSR after a while...
cause the performance parts for GSR is very very little... unless you put in mivec head and pistons and bigger snail (turbine) then maybe you'll be satisfied..
in terms of price.. evo 4 the price now is very very cheap... GSR is going for at least 6.5k now... all because of JPJ that does not allow proton cars to convert to 2.0 unless it is already a 2.0 engine inside...
so if you plus installation and all that... might as well one shot go for evo... 280bhp... rather than 180bhp... thats if you want power la...