The MAC Pro Chamber is the best Flowing crossover pipe on the market! The only problem is it doesn't have cats so it isn't street legal but if your okay with that then you can't beat it, it will outflow any off-road H or X pipe making more HP and Torque. As for after cat systems go with MAC as well, they outflow Flowmasters and personally I think sound better doing it too. I had the Flowmaster American Thunders but I will never buy them again. They aren't bad I just think they are becoming obsolete. There is just better stuff out there now.
Phantom
------------------
CHECK OUT MY MODS
http://www.mustangworks.com/cgi-bin/...splay.cgi?1350