Whell, with my new dyno date being next wendsday, due to me having to cancel the one i had monday due to a huge intake leak, i have a few questions. People on here are making damn good power with gt40P heads, and being about to go on the dyno, i ask the question, how much are my shorties holding me back? Also, the flowmasters? See, i NEED shorty's for emissions, due to i need to swap the stock H back in, but i just wonder, are they holding me back? I guess i'll see in a week, but just wanted to know!