Afr 165,tfs 170-190cc,gt40's any of these will work/flow better than the performer intake. I like trick flows the best. And I def would upgrade the cam if I already was throwing on aftermarket heads/intake. It's all about the combination of parts. You don't have to go crazy with the cam profile though. A good everyday performance off the shelf cam would be tfs1,comp cam 264,etc. a custom cam from somebody like FlowTech Inductions,Etc is ideal.