Short pipe and a passenger, I don't think that will be a good deal. They tend to be louder, add sitting right over top of it, momma probably won't be happy.
Whats the reason for wanting a shorty?
There are a few good regular 2-1 out there, I was down to 2 of those for my bike. My choice was based on Lowe end torque, no drone at hwy speed, and had something behind it when I got on the gas.
Its a big expense, set up your priorities and make YOUR decision
2009 Road Glide. 16 in Vindikta Wild Cats. Aquatic AV, Stinger 700X4 to MMats PA 601, Audiopipe horns.
Ground Zero 7X10 in the lids w/ sspn.4 1000d, tuned with DD Audio DSI-2. S&S 106, lifters, push rods and AC. Drago 2. CycleRama 575. Progressive monotones -1in. 12in. HD adjustable rear shocks. Painted inner fairing. Tuned with TTS. Blacked out!