Oil cooler and remote filter an- size

[Benno84]

I'm about to buy some fittings to relocate my oil filter and lines to my oil cooler

What size is usually used?

I was going to use an-6 with a hose id of 9.5 mm or either a an-8

I'm chasing about 500hp with the motor

Thanks

 

[GSRWRC]

I've used -10 for my oil lines.