Hi. I have a D15b7. Would it be better to do a d16z6 head with a 55 shot of nitrous. Or a d16y7 Port And Polished head with a 75 shot of nitrous.( I dont know if you can use this head so elighten me.) I am worried about the vtec with nitrous because of the higher compression wouldnt it blow the motor..I dont want to do a full swap and I want to stick with the D series. I already have a EX Tranny...Please serious answers and No swap to a B series Answers I want to do something with my D series to many people have a B series swap around where I live.