Last fall I took delivery of a 2015 V8V GT, purchased from a midwest used dealer, that appeared to be bone stock with 4800 miles on it. I couldn't shake any info out of the selling / servicing dealers other than it had the regular services done to it. In December I purchased the Velocity AP tune for it, and in the meantime sourced a low mile Velocity AP power pack kit - headers, 200 cell cats, and back box which I decided to install today.
Starting on the passenger side, I've got 6 exhaust manifolds out through the wheel well and am cursing the remaining two... Rich Redpants suggested in his DIY guide this isn't an easy job - he wasn't kidding. Now I know why he always has a drink present in his videos!
What a surprise as I went to remove the fasteners at the cat clamps I realized I was staring at a Quicksilver badge on the cat delete pipes installed.... While it's tempting to retain these I will have to go through emissions at some point in the future, but do want to ask what experience people have had with headers, cat delete, and performance back box.
I'l be posting the cat deletes with Quicksilver part numbers for sale shortly.

As an edit to the initial post - can anyone chime in with experience installing headers in a 4.7L? It appears most folks have done this themselves in the 4.3... and sounds like the 4.7 requires dropping the front subframe (though bluebarchetta reported in 2015 being able to forego the subframe removal). What have forum members done for install?
Thanks in advance for the insight.
Regards,
Erin

 

And if anyone has suggestions on removing passenger side manifold nuts... there's one I cannot even see in there!

Update - I now understand the 4.7L will require extensive surgery in order to remove and install the manifolds, or at least the passenger side - subframe removal, etc. If anyone has done this on the 4.7 I'd love the insight! I'd like to think I'm fairly competent mechanically... had a few cars apart and back together again in my life, though not something this modern.
Thanks,
Erin