Thanks. Just some more questions, does pulse is also the same (I know the ECU control the pulse). I meant I have B16a head with B20B block.I know B20B needs more fuel,so if I set the fuel pressure regulator the same as stock B20B engine is it okay (around 38-45psi with vaccum off)? Also,the fuel pump rate is the same between B16A1 comapre to B20B? Thanks.