Yes,.. we lost some bottom end (I'm guessing that's the back pressure issue) nothing our $25 aftermarket sprocket won't fix, and she needs to be rejetted still. The nice part is that she's still rich in most of the revs so I'm not going to cook the engine while we get around to the jetting. (The exhaust guy that welded it made that diagnosis, and based on what he did when I asked, he seems pretty used to sniffing exhaust.)
She goes like a bat out of hell in the upper ranges now though. The other half and I took off from the last set of lights before the highway, and she didn't do too bad at keeping up with the 919 ( OK, i wasn't -that- hard on it on the 919, but not being a granny either) I could hear her howling the whole way too.
We went from bone stock ( with after-market rust customization and slight linear weight reduction though (rashed)) to this can.
This one is -much- louder than the bandit's stock can. I can now hear her coming from about 2 blocks away if the other half is on the gas. If not, she's probably 30-40% again as loud as stock at idle. I haven't had the cops show up at the door after doing work on her and having to start and rev her yet.
We're going to look at some quieter packing, because we like the sound, just not the volume -all- the time. Perhaps I'll see if I can post a wav as well later.
We've painted that mid, as well as the rest of the headers. I'll take a pic when Dita brings the other half home.