Here is an example to get started(not my own obviously):
1)
Before: Stock headers w/ F.I. HFCs
After: F.I. headers
2)
Other mods: Stillen Gen IIIs, F.I. catback
3)
Tune: tuned after, not sure about before?
4)
Gear: unknown
5)
Fast Intentions exhaust and header comparison. Before and after UPRev tune (Dyno)