do you guys think it would be worth swaping out my d15 intake manifold and throtle body? for d16z6 parts? and possibly the header. is there any diffrents between the d16z6 and the d16y8 are far as those things? if i were to change the head gasket to up the compression would there be a gain? one more question how about the d16 injectors and fuel rail over the d15 is there a diffrents. i hope someone can help me out. and before anyone says it no iam not doing a swap!