There is a cross-over pipe/connection on the Freedom Performance pipes. You should get a bung fitting for the O2 sensor you won't be installing in your new pipes. Nice to be able to do that while the pipes are off.Thanks for response. I found on a raider forum that the two pipes are actually connected on raider. If they are for stryker, it should act as a 2 into 1. I can see see more gains there. Either way, I found them on discount under 600. They are on the way. Cobra power flo, pipes, and flashed ecu should be at the house around end of week. YAY!!!!!