from what i understand the b16 motor is close to the b18c5 or itr motor. So does this mean i can just bolt on the itr throdlebody and intake manifold or not? And if so are they worth it, atleast for the throdlebody becouse ive heard nothing but good things about the skunk 2 intake manifolds?

 

The B16A shares basic design with the B18C5 but they're hardly 'close', the B16A is mass produced while the B18C5 is hand assembles with go-fast goodies.
Yes the manifold and TB will bolt on but you might want to do the basics first.