I'd go with a can. DA has wraparound headers on their site. Horizon also carries a Bisson muffler for the Evolution 45GX which is the same as the MVVS. If you are down to those two I think I'd lean towards DA simply because there is little data out on the MVVS. Yes I know guys say it turns this or that RPM with this or that prop...but for how many years? That was a factor in my choice.

Here's the muffler... Oops. Horizon updated their site since yesterday. They had a pitts on a 45 in a H9 260. Here's the number of it anyway: BIS05545 Inverted Wraparound muffler I have the picture saved at home. I'll post it later.

If it was me, and I had the money and could stand the weight I would go for the quiet power of the can setup.

Chuck