Originally I modified the stock ' catalytic converter ... cat ' .. split it open and removed a couple of the plates and used a hole-saw through the other plates. Also removed the baffle and fibreglass packing in the stock mufflers. Was happy with the improved grunt and sound. I was told by an exhaust builder it would scavenge better than the Triumph spaghetti crossover. Being up in Darwin you had to make do ..
Triumph crossover and TORS were $2,000 + back then.