I have a project sitting, adapting sportbike dual cans to a VMax for more oomph & sound. I want to install 'em onto a header set for a Max but my bike has a 4/1. So, they are just sitting. I did a similar thing for my UFO 4/1 & it has worked out great, though some may not like the large can. It's much quieter than a UFO 4/1! I had it to redline in 4th & when I shifted into 5th it was still pulling hard, so it doesn't seem to choke the exhaust off. "Closed-course-only."