I am after a difference between the parts needed on a williams engine that are different to a valver?

For example I know the,
- ecu's
- starters,
- engine,
- gearbox etc,

But what about,
- battery?
- spark plugs?
- oil filters?
- fuel filter?
- air filter/air box?
- ht leads?
- dizzy?
- rotor?

This sort of stuff.

Cheers