My car is set up more for midrange and topend HP. Like I said, I have a header back 2.5 exhaust, so pretty much no back pressure. The header is a 4-1. The intake manifold lost a little bit of torque. But, the torque graph is pretty much a straight line across the page, lol. On the tune we were shooting for as meaty a midrange as possible w/o sacrificing top end, seriously, what is the diff between 105 and 110 wtq? No torque is no torque regardless if it's 105 or 110. I expect to get some back when Rocket does a little whittling on my head and valve angles, and I get the RMF b16 header.