Twisted wire on other devices/sensors?

Is it OK to use twisted wires for injectors or any of the other devices or sensors?

Or does it have an ill effect, besides times and cost?

Or if it has any benefit?

Like possibly less electromagnetic interferences or emissions?

No downside, upside can be a more flexible harness. I will often twist the smaller sections of harness that head out to the injectors.

Yes, it takes a little more effort to twist a pair ( or even rope up to 7 wires). Yes, it makes the harness more flexible (and also easier to sheath). Yes, it makes it look even more professional.

3 yes's gets my vote :-)