GSE: Slip on system. Looks fairly well built, least expensive, seems loudest. Not sure what lurks inside as to baffles, etc. but it is sealed and no packing. Spark arresters (need 2) sold separately. Made in USA
HMF: Full system from the port out. Most expensive. Large 5" diameter can. Packed muffler with pop rivets on one end for service. Posted actual DB ratings http://www.hmfracing.com/exhausts/po…sportsman-1000 and dyno plots (XL system and fuel controller) https://www.hmfracing.com/files/mode…ortman1000.jpg on web site. Made in USA
RJWC: Slip on system. Most popular here. Options for sound levels, but need to be special ordered for quiet setup which adds lead time. Quiet system is said to not be as quiet as claimed. Said to fit touring "with modifications" but nothing factual about this, HP, or sound levels. No rivets, fully welded and "lifetime" packing. Made in Sweden