A new engine and model options gave the 1987 Firebirds one of the best lineups for the third-generation cars over previous versions. The new 5.7 litre V8 with Throttle Body Injection was the big news under the hood and increased maximum horsepower to 210. (This was 15 less than the 1987 Camaros with the same engine because of a more restrictive intake.) Though it was only available with an automatic transmission, it has been called “easily the best motor yet installed in a third-generation Trans Am or Formula” due to its high torque rating and flexibility.
For those that desired all the options, the Trans Am GTA was introduced to provide power and luxury. It came standard with the 5.7 litre engine, as well as special new seats, air conditioning, body colored ground effects and the WS6 handling option. On the outside, the only noticeable change to the actual styling of the car was the revised center high mounted taillight. The 1987 Firebird stop lamp (third brake light) was relocated between the spoiler and the rear deck lid, and the large Firebird hood emblem disappeared forever.
Firebird Formula was re-introduced, available with a choice of V8's (LG4, LB9 305 TPI, or L98 350 TPI), 16-inch convex wheels, and the earlier Trans Am "Turbo Bulge" hood. The wrap-around wing was updated and now standard on Trans Am and Formula. WS6 was standard equipment on the Formula and GTA from 1987 to 1992, and optional on the Trans Am. WS6 from 1987 thru 1992 included 36 mm front sway bars, 24 mm rear sway bars, high-speed steering box, gas filled struts and 16" Wheels with 235/50R16 Tires.