Could I possibly upgrade my injectors an vms coil packs to squeeze a little more power out of my turf? I'm more familiar with f an h series because I've always had preludes an I ain5 got the funds to do the k series swap

 

Nope. Neither of those mods will provide additional HP.

 

The D17 is a turd, nothing short of a turbo will really gain you anything, and it probably wouldnt last long boosted either.