All you gsr fans may hate me after I say this but I'm not putting down the b18c It is a great motor. I have a 97 ls w/ a gsr head. I have raced many gsrs(4) and I have one evrytime. I dynoed it at 179.6 at the wheels with i/e/h/pullys/cam grs. The reason I like it more than a gsr motor is b/c w/ the gsr head it drops the compression to a boost friendly level and it also has a lot more torque.Torque on a 4 is always good.The ls/vtec conv is awesome if done properly.