Just ordered Rush 2:1 full system for 07 dyna fxdb. currently run V&H HS slip ons with stage1 a/c. I had the computer flashed. No race tuner or Power commander. Can I just swap pipes and expect the system to adjust itself? I know that with the closed loop FI that it will make adjustments on its own. Also, Are there any problems or tips on install procedure? I've never removed head pipes. Do I need new gaskets? And what about the O2 sensors? remove or reinstall?