The earlier "pedestal" spoiler...
The earlier "pedestal" spoiler is sturdier and much lighter than the later polyurethane over steel "Aero Wing" spoiler, so it's a good upgrade if you want to lose weight and add durability.
Although the entire TPI system can be swapped over to a non-TPI car, this is not only complicated, but stock TPI systems are notorious for choking off high-end power, so it's not a cure-all for a weak performer.
We highly recommend www.thirdgen.org as a great resource for a lot of accurate information. Like any Web site available to everyone, though, there can be some less-than-correct opinions at times.
Most importantly, before you soldier off to the nearest junkyard in search of these crusty jewels, make sure you're bolting them onto a solid car. Also remember that these parts are not going to be around forever-this is a finite window of opportunity in which they are available in quantity. I bought my first GTOs in the early '80s for a few hundred dollars, and the junkyards were full of them. Now original GTO or Trans Am performance options are like gold. Does history repeat itself? I'm betting on it.
| ||Firebird/Formula||Trans Am||Total|
|Total Third-Gen Firebird Production||819,760|
|Third-Gen WS6 Sway Bar Applications|
|Year/Model||Option or standard||Diameter Front||Diameter Rear|
|'82-'84 Trans Am||WS6 Option||32mm||21mm|
|'84 15th Anniv. T/A||15th Anniv. Option||32mm||25mm|
|'85 Trans Am||WS6 Option||34mm||25mm|
|'86-'92 Trans Am||WS6 Option||36mm Hollow||24mm|
|'87-'92 GTA/Formula||WS6 standard||36mm Hollow||24mm|
|'89 Turbo TA||WS6 standard||36mm Hollow||24mm|