Full service and fluid change
Ensure brakes and bearings aren't binding
Fully adjust all linkages include throttle
High spec road legal tyres
Braided clutch hose
Port and polish cyl head
Lighten and balance engine internals
Lighten car by removing unnecessary things like seat motors and roof motor
Electric fan
More dodgy things like
High spec standard looking brake pads and discs
Braided brake hoses
Poly bushes on suspension
Larger diameter ARBs
High spec standard looking springs and dampers
As I understand it, you MUST tell them about ANY modification to the vehicle. So replacing even fluids with non standard as per the original specification would cause a "modification" clause.
