i got a jdm d15b vtec head that i wanna put on but cant find the matching block. i got a d15b2 in the car and a d16y7 block in the garage. with higher compression pistons what block should i use? ive heard of alot of people using the d16 block.

 

Depends on the pistons, since you have to factor in if they will only work with D15 length rods or the D16 length rods

 

im thinking i wanna use d15 with higher compression pistons but just wanna make sure its better than the d16

 

use d16 rods if your using the block. depending on the pistons a high compression will give you a little bit of boost in power.