If your gonna make a pipe to connect with a Super Trap muffler, why not keep it on the right side? and do a 3 into 1.. going to the left side is a waste of time and energy and will require much more bending and piping.. unless you are going to have one pipe on the left and one on the right.. like the Jardines.
Also a quick and somewhat cheap fix is the D&D system, they eliminate the catbox, and put 3 into 2 on the right side. Looks good, sounds good, good power, less weight. You save around 30lbs.. I had that setup and liked it.. got the Jardines now and Love it!! but the Jars are more money..