I understand the concept of gaining and lossing when it is relative... but when it is determined between the timing of the firing system.. and the exhaust flow... I dont see how it would conflict with each other... see what im trying to say?

I can understand that the gain of a filter might gain at some spots but lower at others... thats understandable... if you hook that up with a different intake it might even screw the whole gain completely... but how will the engine firing and then expelling the exhaust hurt the overall gain?

If one is producing more HP from one part... and the other from a completely different system ... I just dont see how it will hurt one side of it...

ECU = firing rate of how the gas is burnt correct? ... deals with the fuel management system... that would inturn expel more exhaust correct? if not ... and it expels the same... then the exhaust would work the full 6.4%... if the exhaust not dispels more the exhaust fumes after the ECU... the new exhaust would help it breathe even better! creating a better outcome... I just dont see how me adding the Eisenhaus exhaust which is proven to add that much HP ... these guys are just some AEM brand ****... they design manufacturing racing exhaust systems... for all different cars! Actually rather famous on Merc and Ferr.... I'm pretty sure they aren't going to lie with their result of 6.0% - 6.4% ... and I don't see how the ECU will degrade that exhaust one bit ...