1981 Trans-Am Twin-Turbo LS9

Joe LohrCompleted Projects

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1981 Trans-Am Twin-Turbo LS9

"Full-Force Trans-Am"

Frame & Suspension
  • Schwartz Performance G Machine bolt-in full length frame
  • RideTech triple-adjustable coilovers
  • Baer Extreme-Plus 14" cross-drilled rotors, 6S 6-piston Baer calipers front and rear


  • Schwartz Performance 1000+hp Twin Turbo LS9 with dry-sump system
  • Aluminum 4" intakes with Spectre filters
  • Schwartz Billet serpentine drive system with power steering and A/C
  • Cooled by an aluminum BeCool radiator with dual SPAL fans & custom shroud


  • Bowler GM 4L85E
  • Custom driveshaft
  • Winters 9” aluminum center housing with Moser full-floating hubs & axles
  • Moser 9” aluminum center section with Wavetrac differential; 3.70 gear


  • Custom stainless-steel exhaust system; mostly 3” oval
  • Custom Schwartz T4 Turbo manifolds


  • RideTech stainless steel TigerCage
  • Restoration parts & Bandit door panels by Year One
  • Procar by Scat "Rally 1000" leather seats
  • Custom engine-turned gauge panel by Schwartz Performance with Stack Dash unit

Wheels & Tires

  • Forgeline TA3P wheels; Red center & polished lip
  • 19x12.5” with 345/30/19 Michelin Pilot PS2
  • 19x9” with 265/35/19 Michelin PS2

Other Features

  • Vintage Air Gen IV Magnum air-conditioning system
  • Rick’s Tanks custom aluminum fuel tank with Holley internal EFI pump


Body fabrication

Bodywork & paint

Engine & turbo system