Just noticed your posting AL.
I have the Stebro exhaust system fitted on my Mini Cooper and I can second your comments. I have seen an appreciable improvement in the mid and high range revs. The system sounds great; a nice deep throaty growl upon start-up and a low rumble on tick over. Moderate to hard accelerating produces a refined deep base sound.
The people at Stebro and the owners Dan and Andy were nice to deal with and I would definitely recommend them and their system. Even the mechanic at the dealership mentioned how good the system looked and sounded!
Mike

