I'm running an Enduro Guardian (EG) skidplate and noted a potential pinch point. Other EG owners that installed other Delkevic systems mentioned that they had to "dimple" the small bay-pass pipe that runs between each header. Mine just made it without modification although it is a PITA to remove the EG skidplate & under engine bracket since it also involves the sidestand. It's best to get the bike as "clean" as possible to remove the old / install the new exhaust system.
I didn't see any quality issues with my system. You can't beat the Delkevic price and I'm sure a $1000 name brand system sounds the same. I still have my OEM system hanging from a roof rafter like a bat (winged mammal of the night).
I've wondered how to make it a little quieter or make the OEM system louder:
1.) Delkevic's longer baffle made no diff in sound level,
2.) Take apart the muffler and add more insulation (Delkevic sells rebuilt kits [insulation blanket / rivets / RTV silicone] for ~$35),
3.) Rip apart the OEM system to remove the CAT and/or by-pass a return loop, weld back together, paint, install. Only draw back is that you get all of that OEM system weight back onto the bike.
Always wear earplugs. First ride I didn't and ears were ringing for next few days.
Last edited by spike55_bmw; 08-11-2018 at 07:38 AM.