I took delivery of my 2017 Mustang GT in November 2016, and I have loved every min besides the audio. I've upgraded the radio to a Kenwood DNN-997 back in 2017 when Metra released the S550 dash kit. Since then its been factory sound. I am mainly just using stuff I have laying around.

Current plans
Zapco DSP-6SL
2x Zapco Reference 360.4
2x Zapco Reference 500.1
Mid Bass - Melodic Acoustics Intimid8rs
Mid Range - Undecided
Tweeter - Undecided
Sub - Stereo Integrity HT18

Untitled by Aron Johnson, on Flickr

Mustang IB by Aron Johnson, on Flickr

Mustang IB by Aron Johnson, on Flickr

Mustang IB by Aron Johnson, on Flickr
I will be using 6 nutzerts and machined screws to secure the baffle at the top, 4 at the bottom, and 2 per side.

Mustang IB by Aron Johnson, on Flickr