I have a set of xpowers which I purchased for my saloon which are actually for the ZTT. I am currently purchasing a set of Cobra quads and if they can make nearly as good a noise as the X's the X's may go up for sale.

See pics
http://img22.imageshack.us/img22/7853/img1057n.jpg

And hear them as fitted to my actual car. http://www.youtube.com/watch?v=KCOCpPUBXzE

The sound can be heard clearest 30s from the end and note the recording is from 3 cars back fully sealed up. Not for the retiring type's.




Steve.