Cubes and myself saw a rotary with a large highmount turbo (read gt42?...it was frikkin huge) and the guy had it on the dyn o for a few hard runs, then he took off up the street a few times.
The guy came back, and shut the car off and opened the engine bay. Cubes and myself were looking at his turbo bag on the car. You could actually go and put your hand on the thing it was that cool.
When my setup is finalised, i'll be using a mixture of all the things. Ceramic coatings dump and manifold, wrapping the pipes, and using a turbo bag.