I recently bought a 2011 Boulevard s40. I'm looking around for parts, but most places only specify up to 2006 models... even Clymer only goes up to 2009.  Does anyone know of an updated shop manual for the 2011 model and/or is there that much of a difference between mid 2000's models and the 2011?

I want to get a straight pipe for the bike because the stock muffler is too quiet.  Any suggestions?

Good luck with the new bike. I haven't had mine long, but so far, so good, and this site can help you with almost any question you may have. And with a username like that, I assume you got to be a good Wolfpacker??!!

I put a drag pipe from Blue Collar Bobbers on my bike. It sounds good and I didn't have to rejet it. It all depends on where you live on if/how you rejet the carb, also each bike is different. Here is a link for the drag pipe
http://bluecollarbobbers.com/web/index.php?page=shop.product_details&flypage=...

Harley take-offs are cheap and effective. Many on here have used them and here's a link that Serowbot created on how to do it:

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1298689417

The only real differences between the mid 2000s and your 2011 is cosmetic. Drive trains are the same.

Real cheap start,, A Dyna muffler, sounds better, looks really nice on this bike  & opens the air flow up, so, theres some Bump in power.
You dont like that one, then yuo can spend some $$$ on the options, If youre after Max Performance, the Supertrapp is an option. Not as pretty, but tunable.  If I was gonna suggest anything, Id suggest you take a deep breath & take your time,, You may want more mods than just the pipe,, make sure the long term mods will work well together. If youre gonna want to go with a hotter cam or maybe a Lot Hotter cam & a bigger carb,, well,, it would stink to lay down a load O $$$ for a pipe only to discover it wont let ya make all the power the bike can make.
However you go about it, Ill bet in a ew years, youll still be diggin the bike.. welcome!

That s50 looks sweet.

I"m going to try out the Dyna muffler first and see how that goes.  Found one for 25 bucks.  Seems to be an easier, cheaper, and more easily reversible mod.

I personally like the sound of the Jardine Rumbler slip on that I bought....low rumble at idle and real good sound at cruising speeds. At least thats my opinion