I am tired of hearing i/h/e only adds 5 whp, that is just people regurgitating what they hear so as not to sound like ricers who think they add 50 horsepower. Fact of the matter is, i/h/e adds a lot more than 5 whp. I dyno at 150 whp, and have i/h/e/cat/no ps belt/crower 403 cams. Stock is about 115 whp. So if i/h/e is only 5 whp, then the cams added 30 whp? PUH-LEASE! i/h/e added at least 10-15 whp and prepped the engine for the cams. I'd say on a b18b with i/h/e, you'd be putting out around 135-140 whp.