The crushing of those exhaust donut gaskets can be eliminated with a short (maybe an inch and a half) sleeve of 1-3/4" exhaust pipe slid inside the donut to support it.
it worked for me prior to the changeover to the Mind Train pipes.
Careful 'dimpling' of the 2-1/2" pipes at the tight points gave me clearance at the swing arms, after a few miles the sway bar made it's own clearance dimples.