wow .... endorse already ... worth to buy ....
4G93t terbalik most of the part same as 4G93t for wira version one, the cam pulley , valve , valve spring, piston from 4G93 old version can fit in the new version one. But not sure the spec for the valve spring same anot. For the piston modification, you can do like ppl do on their old version 4G93 .
For the ECU modification , you can go for Microtech , Haltech ...... many more ... piggy back SAFC also can .
Turbo modification more easy , any turbo size you like also can put in . Hahahah , depend on what power you need.
So far I think the most difficult performance part need to source for the 4G93t new version is the oil pump and hi cam.