Use 00 spec ctr/itr cams with itr inner & outer valve springs & retainers.

Some cam gears will help out some also for tuning purposes (more mid range power).

Oem parts kick butt

If you want to go aftermarket I recommend skunk2 stage 1 cams & factory itr valve springs or skunk2 valve springs etc...
Toda makes good stuff but its too pricey.