even i might not have much experience,my suggest to u is=
1.upgrade ur suspension kit to the best suit to ur usage.
2.save ur money and wait until 2 years then change the engine and at the same time change to bigger turbine and better computer and even bigger injector maybe from kelisa.
3.this would be much more economic,imagine that Rm2500 for turbo engine or Rm2500 for blah blah blah exhaust,extractor,filter then end up a L2 over take ur car.really dissapoint if i were u.
4.y i suggest u to wait 2 years?becoz ur clutch pad,timing belt and so on have been wore out by time.and to chnage ur clutch pad, u need around RM500 juz for the pad.timing belt can easily cost u around Rm200.
so think abput it.