I have had Solo's HFCs and their Mach XL cat back on stock manifolds for about two weeks now and i can tell it freaking awesome. It gets better sounding every day. Its got this interesting deep hollow metallic rumble. Just sitting at idle sounds down right mean and since it had j-pipes there is no drone.
This video doesn't really do it justice, but check it out.
http://www.youtube.com/watch?feature...&v=0wM55XLYQbg
Edit: Sorry, didn't realize I was in the V6 forum! I have the 8, but I am sure their stuff for the 6er sounds awesome too!
