Ref “A”
These square warning lights normally have the function illuminated.
If you look closely you can normally see the wording.
Common warning lights are:
Choke - on petrol engines only
Park Brake - obviously handbrake warning light
Brake -...
My thoughts:
Only one cylinder sucks at a time, so having a higher volume of high pressure air (turbocharged pressure) close to the inlet valve is probably a benefit. So the two pipes and larger bore should in theory be a benefit - but just...