Well Mr. McIntyre there are some stories here. Let me give you the bad news first, your car 05-0820 VIN 1ZVFT82H755148138 is not a Stage 2 Roush, it was originally born a Sport. Not to fear though, you have a rare Roush with forklift holes, as your car was born on 04/18/05 and one of the thousand or so forklift holed cars. With low mileage, a very valuable car indeed.
So starting in 2005 and running about 2 or 3 years you could buy the Roush Stage 1 or 2 emblems for the dash (placed between the air vents) for about $50 from Roush. The whole idea was not to badge engineer your car, but rather you could, as an enthusiast, buy a Sport and then later purchase all the parts from Roush to upgrade your sport to a Stage 1 or 2 as you see fit.
In your case either someone thought they would convert the car to a Stage 2 (which is actually what I did to my sport by the way) or they just wanted to be cool and stick a $50 badge on their Sport and call it good. Now, you could only buy the Stage 2 dash badge for a couple of years, I think since most people were not converting their cars over suspension wise but just passing a Sport off as a Stage 2 may be the reason Roush quit selling the dash badges after a while. I may be wrong on the reason, but they were only available for a few years direct from Roush.
More commonly you would see and still to this day see a Sport advertised as a Stage 2 from a used car dealer because it has the italic "2" gas cap decal and aftermarket 18" wheels. That again does not make it a factory original Stage 2. This is all too common because folks don't know the history. The secret way to tell if it is one of the real 29 Stage 2's made in 2005 is to look at the rear "gas" cap badge. In 2005 you will have the block font number "1" or "2". For 2006 and up the font will be italic or "1" or "2". Again you could buy from Roush the gas cap with the "R" (Roush) 1 or 2 but never the 3. However, all were in the italic font, not a block font.
So let's take a deep dive into a Stage 2 for 2005.
As I mentioned earlier, due to EPA testing Roush could not and did not get the M90 Roushcharger done in time for the 2005 models, thus there is no such thing as a factory Stage 3 Roush in 2005. Didn't happen, Stage 3 came along in 2006 and later. So this makes the top dog the Stage 2 for 2005. So 13 of these 29 cars are RPP demo cars. The RPP demos are test cars, Roush executive cars, or special cars (like magazine press cars), and in 2005 there were a handful of Stage 1 RPP cars as well. Specifically, though these Stage 2 RPP cars were used in the reality Discovery Network show "Racer X". The premise being take up and coming racers and have them compete in Stage 2 Roushs for a chance at a NASCAR career. Several future NASCAR drivers were in this show.
So I think 12 cars were used in the Racer X show as the 13th RPP demo car was an automatic (05-2156 white). Also of interest and the original owner made a huge deal out of this that he bought a Stage 1 or Sport and soon had Roush convert it officially at the factory to a Stage 2. So Roush changed the official record and made this car a legit factory Stage 2 (05-0244) Torch Red.
How do I spot a true, factory 2005 Stage 2 Roush?
1. Blue Roush sway bars and shocks
2. block font "2" gas cap
3. Stage 2 dash plaque
4. 18" Roush wheels
5. my list of Stage 2 Roush numbers and VINs.