I need help with an exhaust question. I have a 2004 Road King Classic with Sreaming Eagle slip on muffers. I removed both mufflers to aid in the rear wheel removal. I put the mufflers back on but did not mark the right or left sides. Are the slip on mufflers side specific? Does the right have to go on the right and the left on the left side only? It may be my imagineation, but it does not seem to have the same power as it did and sounds different than it did before removing the mufflers. Thank you in advance for any input.