I think you guys are getting too technical...
To the OP, did you cut a hole on the body to match the where the stinger is on the pipe? You HAVE to cut that hole, otherwise the exhaust is hitting the body and hurting the performance of your engine. Also, by adding a piece of tubing to the stinger you will HURT the performance of the engine. Just cut the hole in the body and leave as is, theres decades of people running the exhaust on the side, we all know what we're doing.