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if you want to quietly boost your car, you need a DV [DIVERTER VALVE] not a BOV [BLOW OFF VALVE] the dv vents the excess boost back into the intake tract while the bov vents to the atmoshpere, which is bad any ways b/c it causes you to run lean between shfts.

i currently have a mini me single cam motor in my crx with my original d16 bottom end which i blew this moring. i was wondering if the d15 block is identical to the d16 block, is that extra .1 liter in the head??