i just swapped in a d15b, and i put a y8 intake manifold on it, i started it up today for the first time, and theres a big vacuum leak coming from the middle/top of the intake manifold where it meets the head. i used this y8 mani on my d15b7 with no problems, will the y8 mani, not work for the jdm d15b? i can put the d15b mani back on, but the y8 mani is alot bigger, and i dont want to give up the hp.