If it's not already the Supersports exhaust this makes a good loud noise. You can see it under the Aero Racing section of the Morgan website. Not sure how easy it is to modify the exit points of the wings. Others have looked into this and you may find more info in earlier posts.
I've got an Aero 8 with the single side exhaust and the Supersports makes a lot more noise than that, although for me the single exhaust is better for most of the time.
