Tom hows it going buddy...The exhaust thats on my car now with the xpipe and has least amount of drone to date...its almost smooth with alot of high end sound. I will have to get some sounds clips here in the next couple of days...but you do get some drone!!! I haven't been able to build a single exhaust out of the 4 or 5 ive made without the drone. The car is so light and not so well insulated....the first one I did with a custom bullet race mufflers with the 3 inch straight & ypipe produced the most drone out of all of them. when adding an h pipe or x pipe...your eliminating that almost by 60% its pretty drastic how the sound changes with an x pipe...So if you are wanting something with no drone I would suggest going that route! As far an N/a exhaust If their is somebody willing to drop off their N/a car for maybe 3 or 4 days I can try and make an xpipe true dual set up....Im not sure how the under carriage of this car is? I wonder if the piping is the same coming off the down pipes??? If so I wouldn't see any reason that you couldn't use the X pipe that I have pre made....? but I would want to test fit and try it out with a couple of different muffler designs I have as each have much different preforated piping inside each muffler with different sound and drone. I have made both 2.5 and 2.25 x pipes, Id imagine running 2.25 in the N/a would be suffice. I would need to a couple of dyno runs in that car with a couple of different set ups to make sure its worth trying to sell. Sound wise I have it down on the srt as the sound my cars make are unreal! Im sure I could get very similar sound out of the N/a as well.