I put my 845 in one of these self cleaning bottles to make dispensing it easier. It is good stuff!
https://www.detailedimage.com/Meguiars-M43/Dispenser-Bottle-P527/16oz-S1/
This from Borla in the Borla exhaust for GT350 thread. The stock sound is great, but you do get more volume with the FP exhaust.
https://www.mustang6g.com/forums/attachment.php?attachmentid=96065&d=1474276736
I don't think Borla has released their headers yet, but i would love to hear them paired with the Borla Attak or Ford Performance (by Borla) exhaust. That might be the ticket....
Having heard Matt's exhaust in person I can say that it is pretty different than stock. The long-tube headers refine the sound and raise the pitch more. It definitely pushes the voodoo sound closer to the exotic/Ferrari end of the spectrum. I wasn't sure after hearing his videos on-line, but...