bonnet wasnt done by myself but one of the previous owners ,when i got it the bonnet vents were chrome and looked like stuck on plant pots looked awful awful, since then i cut them down to sit the way they do more flush painted them black and meshed them and yep there functional too not for silly induction but to aid cooling as the other vent on the bonnet is also functional as theres a hole under it so air goes in straight onto the engine and the warm air created gets blown out the top which also helps in winter by creating warm air being blown on the windscreen helping with ice removal.
personally i would rather have a standard bonnet but the it does work and ive had a lot of folk thinking ive got some turbo crazy engine under