wondering what type of muffler sounds best on the k5s. actually trying to quiet my straight pipes down. thinking a super 40 or 50. what do you guys think? post a video clip if you got one you like.

 

I say Super 40.

 

none. get the headers that all roll into one tube and stick up out of the hood. Like stacks-ish for a gas engine! OR dual straights no muffler.
lastly if you HAVE to get a muffler... go with the same dual out straights but affix warlock (or similar) mufflers just off the headers so you can uncap them all the time, and cap them as needed

but then again i have 0 K5's