Looking at pipes on ebay. There are shotgun style SEs without the crossover tube. Do I need SEs with the crossover? Or does it matter? Also what it the best peforming and sounding slip on Harley has? Or should I go with something else? Cycle Chack? there is a set on there now for 88.00 # MHD-138ss. This is for a 05 injected Fatboy.