Interesting topic. I like the idea.
My best mods were by far the 4.10's and MGW shifter. Then for sound my Focal setup is the best.
Worst mod(s): Magnaflow mufflers (Replaced with Flows), Bullit pedal covers, 03 cobra spoiler, Any of my collection of bolt-ons, Kicker subs and door speakers.
Petunia - 05 Mustang 4.0 - Waiting for little brother to come of age
Matilda - 01 Cobra 4V 4.6 - SOLD
Bernadine - 09 Mustang 3V 4.6 - Daily Driver