1981 Firebird Trans Am with a Twin-turbo LS9

When this 1981 Pontiac Firebird Trans Am rolled out of the factory it was sporting a 301 ci (4.9 L) turbocharged V8. Schwartz Performance has since turned it into a pro-touring machine along with increasing the displacement and adding another turbo.

Schwartz started by upgrading the foundation with one of their G-Machine bolt-in full length frame. This gave them the ability to easily upgrade just about every other component such as the Ridetech triple-adjustable coilovers and Baer Extreme-Plus six-piston brakes in both front and rear.

Under the hood you will find a LS9 with Wiseco forged internals, ported heads, Eagle LS7 crank and LS7 dry sump system. Combine that with two 70 mm turbos and you get 1,041 horsepower and 858 lb-ft of torque to the rear wheels.

Connected to the engine is a Bowler Performance 4L85E automatic transmission, custom length driveshaft, Winters 9″ aluminum housing with Moser 9″ aluminum center section. Capping this off is a Wavetrac differential with 3.70 gears and Moser full-floating hubs and axles.

Source: Schwartz Performance via Speed Society FB post