I got a 97 CIVIC EX with 99 SI B16A2 swap, the car is right now using a 96 GSR P72 ECU since it plug right into the ecu harness (still using the EX harness) but a friend told me not to use the p72 ecu b/c the gsr has two stage manifold. What does that mean? He also to me to use p28 to reprogram it to DOHC spec and get ODB II to ODB I conversion harness. My quesiton is that can I use p28 (sohc vtec) ecu with DOHC motor? IS there any other ecu that I can use in my car that will make it other? let me know alll the info on the ecu's thats the best for my application...thanks guys