So...finally got some great weather in Hampton Roads and took Lucy out for a real spin last evening to test the BMC/Smooth Tubes and Fabspeed combo. As I suspected the acceleration is definitely more responsive. Most notably in the Corsa mode the gear shifts are harder (more so than before) and now when I launch all wheels spin whereas before maybe the rears would spin for a moment. Seems to reach redline quicker...I need to measure 0-60 and 0-100 times but currently I'm looking for a reliable app to do that. Maybe someone can make a suggestion...overall I am very pleased with the "bolt ons" and even without a tune I am happy.