Choices of best are subjective. I may prefer a deeper rumble someone else may prefer a higher bark sound. Then theres the "bang for the buck" & I expect the HD muffler is the better choice based on a compromise of good sound & good performance & low price. Now, I have to admit, I went with the Supertrapp. It was spendy, but I wanted the tuneability & performance it offered, It also sounded as good as I wanted. That was just pure luck on sound. I had no idea what it would sound like when i ordered it. I ordered it for the sake of tunability & performance. It opened the bike UP. It was a totally different ride. Then, added a fork brace & it was a new bike again. With each performance upgrade I went thru new learning & riding changed. Corner speeds changed with the exhaust & jetting, then again with the fork brace. I had to grow as a rider after each set of changes. I am glad the bike isnt everything it could be right off the showroom floor. Riding it stock, I learned a lot, then with the first upgrade, it took a few months to be able to utilize the newfound power, then with the forkbrace, I was able to expand the riding yet again. I would recommend the forkbrace as soon as possible, tho.  Hvae fun with that thing. get comfortable working on it. If you dont have the tools for basic maintenance, if you want to save $$ on tools, maybe starting to haunt a few pawn shops would be in order? You can go ride on Saturday & scout a few shops for tools, ride around & scout some more.. Its as good a reason as any to go for a ride!

911 radiomans brake pedal mod is the cheapest and easiest to perform. Autozone number 20730. about $3.00

Asking again

How do ya'll know when you search for a muffler,used or not,if it will fit the Savage? Is it pretty simple to figure out?

I'm thinking moreso about the Supertrapp.

Jump on the Trapp if you can swing the $$ easy enough. You wont regret it, BUT, save youself some freight & get the additional 6 disks, for a 14 total. The 8 that come with it arent enough.
If you will post which one you are gonna order I, or others, will look & make sure it will fit, I di think there was a model or 2 they make that wont.

Get the Supertrapp, get one that fits an LS650. Whoever takes the order will want a year model. Your bike will likely NOT be in their book as a known fit, Mine wasnt either, but it does. They may not yet have the S40 in their books, so, tell them its the LS650 Savage. IF they dont have the 06 in their book, If they do, great, if not, no biggeee, tell them you want a Trapp for an 04 ls650. or an 03, same thing.

FreeSpirit wrote on 12/31/69 at 16:00:09:

Let's put it this way... the LS650 is too lean to begin with and should be adjusted (and probably rejetted) just to run cooler and reduce/eliminate backfiring.  Just about any replacement exhaust will increase airflow and make it leaner overall, which will necessitate retuning.

I think the 2nd Cheapest is the Chrome Tank / Fender Trim - $10.00 or so.
It's the same chrome stripping you put on the edges of car doors.

The header pipe is 1 3/4 " diameter. Of the two Harley mufflers I believe the Dyna muffler is the most direct bolt on. With a short adapter pipe you can use the factory muffler bracket and one bolt. Works fine in place of the factory two bolts. The factory muffler is pretty hefty. I have not seen the Sportser muffler but from what I understand the mounting is a little different. Just takes a good look and some minor adjustments to mount up.