I contacted Procircuit. Their T5 for the KLR doesn't require repacking. However, I couldn't find anybody that had one or even a picture of one on the bike. That being said, I went a different route.
Funny; from their website:
The T-5 Stainless Slip-On Silencer for the Kawasaki KLR650 is a mechanical silencer that comes with an internal perf-core surrounded by packing. The T-5 Stainless Slip-On Silencer is designed for a rider looking for an inexpensive, easy-to-install, lightweight performance silencer that can bolt right onto their stock head pipe.
Aluminum muffler brackets
Stainless steel mid pipe and end-cap
Asymmetric muffler design
Removable USFS approved spark arrestor and optional insert for closed course racing
....looks like the same basic silencer as all the rest of the packing types. Without any sound data, I wouldn't buy it....particularly at that price. The Q4 is cheaper, is also USFS approved with a spark arrestor and has been measured at 96db on a KLR.
so, do tell what you decided,