my 2cents..

performance means nothing without safety features..

if u play N/A,
-high cam
-management
-lighten c/p
-adjustable
-better exhaust setting (pickup or top end?)
-racing clutch n lighten flywheels
-n dump a big bag of rm100 behind your car.. i guess that bring out the word 'PERFORMANCE'
-buckle your seatbelts!

turbo?
-bigger turbo lor
-almost same like playing NA
-regularly check your engine oil bla bla bla..
-dump a bigger bag of rm100 behind your car
-buckle your seatbelts!

most importantly, get a better absorber, brakes, n stuff..

'INGATLAH ORANG YG TERSAYANG!'