yes port and polish done correctly will definitely improve performance...
price depending on who is doing it... there is no fixed price for port and polish job...
u can try nastyportflow in usj 1, behind summit.... they have some high precision tools there.... its not like u can try n error when it cmoes to pnp ur car.....
If you in jb can try xh racing,call0197853245.
I did my 6a12 v6 pnp together with 3angle and skim head at xh racing ,jb.price affordable.definately increase hp but need to adjust valve timing.
So my fingers and wallet were itchy and was tempted to try those space saver tyres (AKA Sotong Tyres). Purchase a pretty good one as per advice by the chop shop fella and man was I in for a surprised on the work...
I'd encounter some problem again on my AYC.
Start engine 3 lights on then drop to 1 light (tarmac). Then after few minutes drive. Suddenly 3 lights up again.
I tried to retrieve previous thread on AYC. Some...