Wanting to cut off exhaust and at the headers and custom straight pipe and heat wrap .

Just unbolt the goats belly. No need to cut. Might have to rejete

Running straights on our high RPM twins doesn't sound good from my point of view. HD Sporty mufflers are a nice compromise if you drill out the baffles- you'll get your louder sounds, but because they're essentially a glass pack, takes the edge off the exhaust note, until you open up the throttle.