Has anyone tried this setup? What are your impressions?

http://www.dynatechheaders.com/fordsupermaxx.html

 

RCKCRSHR,

Flats Man put it on his heavily modified blown 4.6. He did have the "Y" pipe removed to run an "X" pipe and dual exhaust. His truck probably puts out more than twice the ponies of a regular 4.6. This system is probably more than adequate for the rest of us.

Rick