You could duplicate your boats paint scheme red white ,.... solid red or polished.

Gray like Yamaha24's cafe gut ;)

Yellow The McDonalds sponsor look never gets old

Red. the white will look nasty once it starts to accumulate dirt and grease..

Would you like to trade blowers? :p

Red or PVD coat in Silver.

I guess everyone agrees with the wife ; red.
Question, are those too large to anodize? Don`t know much about anodizing , probably very pricey? -Would be cool to have the same red as all the AN fittings

I think the red to match the blocks would look nice.

maybe a candy red powder coat

Don't have to anodize to get the look. Look at color chrome powder and ceramic coating. Much cheaper and same look.