Ya, im gonna have to agree with big inch here. i built a hemi with stage V heads that were supposed to be all that and i was sadly dissapointed with 1100hp,predators are bang for the buck and those heads are the best option!! in a lower hp build if you buy some victor heads/ harland sharp rockers/ springs,retainers and locks that stuff still ads up to be a fair chunk of money and then your limited.