bought a 2013 model last month, and am now trying to find exhaust slipon to make it sound better...no luck. It stops at 2009, I think.

anyone can help?
I hate the idea of drilling holes

As far as the exhaust, header and bracket goes... all savages are alike.

If you want to spend the money, Raask makes a drag pipe with baffles for the S40.
http://www.raask.se/
I bought mine directly from Raask. It has a larger diameter header.
It is quite a lot louder than stock (85 db at idle 3 ft back and 3 ft up, which is the way the local cops measure it). The Harley owners I sometime ride with describe it as "really effen sharp" when I pass them on the highway.
I didn't notice any "drag pipe sag", possibly due to the baffling, or to the fact that I run a dial-a-jet system on mine. I use a 55 pilot and a 150 main jet and a K&N filter, and a 2/3 spacer mod. I occasionally have a crackle when I downshift and never have a shut off pop.

& a Dyna looks good, sounds good & are almost always cheap,, & readily available in your home town.. If you dont like it, you can always throw cubic money at it,,

I spent the Big $$$,, Got the Supertrapp, I coulda had 95% of the performance increase by slappin a Dyna on it,, AND the Dyna looks better,, If I had it to do over, Id start cheap & go with the Dyna,