as far as power goes it did according to your graph. however it didn't have as much torque. and what are you a dyno expert now saying that the pull could have not been accurate....of course the dyno is not 100% accurate but who are you to say how accurate it is, If your car had 140whp according to the dyno you wouldn't sit there and say hmm maybe i only had 138 because the rollers were spinning at varible speeds. This whole time my point has been A test pipe is not a bad purchase for the price and gain you get vs a stock cat. I never said that either was better...your the one who gave your opinion and said you felt a highflow cat was better than a test pipe, and according to your "evidence", the high flow cat doesn't outperform the test pipe either.