as i mentioned in my thread, dynapacks tend to over rate slightly. the guy who runs the dyno shop told me his s2000 put down 211 whp on the dynapack, 200 on a dynojet (traditional roller dyno). dynapacks are far superior for tuning, which is why he uses that setup. dyno's are misleading, trap speeds are more accurate. the thing that IS correct, is the gain. so the 30 whp and 40+ feet of torque are for real. and this is far cheaper than renntech. i was expecting a bigger gain too, but still that torque curve is very nice.