Quote Originally Posted by b16acrx
B20z2 with vtec ? P72 is a gsr ecu which has iab and a knock sensor, which makes them more costly. If a b20 doesnt have a knock sensor and your not running a gsr intake, you should probably go with a chipped p28 or a chipped and vtec converted p06, p05, p75, pr4. Just my input.
b16 is right. You want something with out a knock sensor.