I'm tuning up my Savage and I want to find a complete exhaust system or at least a header pipe since, I've found alot of slip on mufflers. Does anyone know where I might find performance header pipes for the savage? I'm also looking for a gel seat or something more comfortable to sit on any suggestions? thanks

Just about any aftermarket pipe, including the HD mufflers, will improve performance.  However, you mentioned a performance header.  I'm guessing you mean an exhaust system that includes the header portion.  If you mean specifically a "performance header" itself which I would interpret as having a larger diameter in which to move more air, I imagine it wouldn't make much difference unless you already had the performance cam, carb, etc., installed.

Raask makes a new pipe for the Savage that is in 2 pieces. Not sure on the prices though. Could be cheaper since the box would be smaller to ship.

http://www.raask.se/sls.htm

Honestly, re-jetting and a high air flow exhaust just give you more top end for highway driving. Before re-jetting I could barely do 100km/h after I could reach 130km/h no prob. But the bike is not any faster. It loses at bottom end. I did however buy a vm mikuni carb, plus the dial a jet and UFO from thunder products. All this is supposed to give about 1 horse power increase per 100cc of displacement. As for a gel seat, they are about 200$on ebay or you could look at my easiest ever gel seat mod which should still be in this section if not moved to the how to section. Either way good luck on your search.