My bike is an 03 electra glide classic. A few months ago I installed a set of ss 510 cams, filter upgrade an a set of sampson slipons, and had a dyno tume preformed. I ended uo with 76 hp and 81 tourque, not much bennifet for 1500 bucks. After the, so called, upgrades were done my wife and I decided the noise leavel was a little to much for long distance touring. My question is can I put my stock muffflers back on without looseing my few hp gains. My stock mufflers have been opened up a little befor I did the cams. Experienced advise appreicated.

 

I have basically the same build but had mine tuned at Doc's in St. Louis and you can see my torque is way better than yours. Might need to have it re-tuned. My Wild Pigs aren't overly loud as the wife says she hardly notices them.

 

Same build, check out my numbers. Id say get a good tune, by increasing back pressure as in stock pipes you will give up numbers, again see my numbers.

 

Im not a fan of Sampson pipes slip-on or otherwise. And yes you will get some torque back with stock slip-ons. A 2 into 1 would give you the best results.